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{{Project data
| authors = User:Kyle basnett, User:Bourgeois
| status = Deployed
| completed = 2013
| made = Yes
| replicated = No
| cost = USD 205.77
}}


{{305inprogress|May 15, 2013}}
A rainwater catchment system will be built on a house in Blue Lake of Humboldt Country in California. The rainwater will be carried from the gutters to storage tanks for use in flushing the indoor toilet and watering the garden. [[User:Kyle basnett|Kyle Basnett]] and [[User:Bourgeois|Colin Bourgeois]] are working on this project as part of the Cal Poly Humboldt's Engineering 305 course in Appropriate Technology.
 
[[File:J-gnarly-system.jpg||right| ]]
 
 
== Background ==
A rainwater catchment system will be built on a house in Blue Lake California. The rainwater will be carried from the gutters to storage tanks for use in flushing the indoor toilet and watering the garden. Kyle Basnett and [[User:Bourgeois|Colin Bourgeois]] are working on this project as part of the Humboldt State University's Engineering 305 course in Appropriate Technology.


== Project Goals ==
== Project Goals ==


#Design and install a safe, easy to use and maintainable rain water catchment system.
# Design and install a safe, easy to use and maintainable rain water catchment system.
#Acquire water storage containers for 200 gallons of rainwater storage.
# Acquire water storage containers for 200 gallons of rainwater storage.
#Connect the rainwater catchment system to the toilet tank for a gravity fed rainwater toilet.  
# Connect the rainwater catchment system to the toilet tank for a gravity fed rainwater toilet.
#Design and install devices that will ensure water damage does not occur.
# Design and install devices that will ensure water damage does not occur.


==Criteria==
== Criteria ==


The following criteria, constraints and weight of importance will help guide us through the designing and building process of this project. This list was compiled by Colin Bourgeois, Kyle Basnett and our client J Gnarly.  
The following criteria, constraints and weight of importance will help guide us through the designing and building process of this project. This list was compiled by Colin Bourgeois, Kyle Basnett and our client J Gnarly.
<center>


{| class="wikitable sortable"
{| class="wikitable"
|-
! Criteria
! Criteria
! Constraints
! Constraints
! Weight <br>(1-10)
! Weight<br>(1-10)
|-
|-
| Function
| Function
| Collects and stores rainwater.
| Collects and stores rainwater.
| <center>10</center>
| 10
|-
|-
| Safety  
| Safety
| Does not pose a safety risk to people or the house
| Does not pose a safety risk to people or the house
| <center>9</center>
| 9
|-
|-
| Maintanence
| Maintanence
| No More than 15 min/week cleaning and maintaining
| No More than 15 min/week cleaning and maintaining
|<center>8</center>
| 8
|-
|-
| Budget
| Budget
| Spend less than $200
| Spend less than $200
|<center>7</center>
| 7
|-
|-
| Asthetics
| Asthetics
| Needs to look nice
| Needs to look nice
|<center>5</center>
| 5
|-
|-
| Reliability
| Reliability
| Works every time
| Works every time
|<center>9</center>
| 9
|-
|-
| Usability
| Usability
| Flushes and fills like a conventional toilet. Simple to switch from rainwater fill to conventional water fill
| Flushes and fills like a conventional toilet. Simple to switch from rainwater fill to conventional water fill
| <center>8</center>
| 8
|}
|}
</centeR>


== Design ==
== Design ==
For this project we will be utilizing the existing gutters on the house to direct the water flow where we want it. We have added the necessary plumbing to lead the collected water from the front and back gutters, into our storage tanks in the back of the house. We have placed gutter filters into the gutters to strain out the bulky material, and a first flush to sift out most of the smaller debris.
The storage tanks are set on top of the stand that we built to keep them high and level. The tanks are connected together on the bottom and sealed so that they will equalize. The water is then allowed to either head into the house, or into our secondary release valve. We have situated a shut off valve that can have a hose attached to it for directed water distribution. The piping into the house has a shutoff valve for the houses main water, and to shutoff our rainwater. This allows for switching between water sources depending on stored water levels.


<!-- At some point you may want an image gallery here. -->
The roof of the house is asphalt shingle and the area is approximately 1400 square feet, since the roof is asphalt the rainwater collected from will not be used for drinking, instead it will be used to water the garden and flush the toilet. 3/4" PVC pipe will transport the water via gravity form the gutters to the first flush device at the rear of the house. The first flush device has a 10 gallon capacity, the literature on rainwater collection systems calls for 10 gallons of first flush capacity for every 1000 square feet of catchment surface (generally the roof). With 1400 square feet of water catchment surface it will take.3 inches or 7.5 mm of rain to fill the storage drums to capacity with 220 gallons of rainwater.
 
See the [[Rainwater Catchment J Gnarly#Progress Images|Progress Images]] section for pictures of the components described below
 
=== First Flush System ===
 
The first flush for this system is 10 gallons rather than the recommend 14 because the rainwater is being used for applications not requiring total debris removal, also the frequency of rain in the area and the lack of debris that collects in the gutters make for little build up of debris on the roof. Water continually drains from the first flush system at a rate of 2 gallons an hour, this rate is slow enough that significant rainwater will not be lost from collection and fast enough that it will drain completely before another major rain fall. Once the first flush collects 10 gallons of rainwater a racquet ball, floating on top of the water in the 4 inch ABS pipe is pushed by the water into a 2 inch ABS pipe and seals off the first flush, preventing additional water from entering and forcing the water to flow into the 3\4" PVC pipe connected to the storage drums.
 
=== Storage System ===
 
Four 55 gallon food grade plastic drums painted green to prevent algae growth due to sunlight sit vertically on top of a sturdy platform and stand just behind the house by the bathroom. The stand is constructed from 9 pressure treated 4x4s and each one is set 2 feet deep in the ground with 100 pounds of concrete. A pressure treated 4x4 and 2x4 platform sits on top of the plum and level stand holding the storage drums at a height of 5 feet 9 inches. The drums are connected on the bottom through their bungs by 3/4" PVC and each tank has a 1/32 inch hole drilled in the top allowing the drums to quickly equalize their water levels. The PVC connecting the drums has two water outlet pipes; one goes to a ball valve and a then a hose fitting to water the garden, the other outlet goes to a ball valve and then into the house to connect with existing plumbing.


==Proposed time line==
=== Plumbing ===


*March 2nd - Have a current list of necessary materials, and goals.
The existing plumbing for the toilet from the water main and the rainwater plumbing both have ball valves accessible from the kitchen in the water closet so that the toilet can be flushed with water from the main if the rainwater tanks run dry. Typical water pressure in modern houses is around 40 psi and the float valve that fills the toilet tank when empty requires a 20 psi minimum to operate, this rainwater catchment system has a max head of approximately 5 feet, giving the system a max psi of approximately 2 psi.
*March 4th - Have all main materials.
The storage tanks are set on top of the stand that we built to keep them high and level. The tanks are connected together on the bottom and sealed so that they will equalize. The water is then allowed to either head into the house, or into our secondary release valve. We have situated a shut off valve that can have a hose attached to it for directed water distribution. The piping into the house has a shutoff valve for the houses main water, and to shutoff our rainwater, this allows for switching between water sources depending on stored water levels. The two separate pipes connect via T junction after the ball valves and go into a conventional toilet hose then into a 1/4" copper pipe to a float valve meant for an air conditioner. The float valve has the float removed and the float ball rod is connected to the rod for the conventional and existing fill valve device. This custom device was fitted to the toilet with stainless steal sheet and copper wire and is firmly in place. The toilet tank fills at a rate of 5 minutes a gallon, this rate is slower than desired and will be addressed in the coming months, see the [[Rainwater Catchment J Gnarly#Lessons Learned|Lessons Learned]] section for more information about this.
*March 8th - Have design refined.
 
*March 10th - First installation (1st trial).
<!-- At some point you may want an image gallery here. -->
*March 17th - Work on refined plan and adjust potential problems.
 
*March 29th - Test and discuss quality of work.
== Proposed time line ==
 
 
* March 2nd - Have a current list of necessary materials, and goals.
* March 4th - Have all main materials.
* March 8th - Have design refined.
* March 10th - First installation (1st trial).
* March 17th - Work on refined plan and adjust potential problems.
* March 29th - Test and discuss quality of work.
 
== Literature Review by Kyle Basnett ==


==Literature Review by Kyle Basnett==
This is my review on the available literature relevant, and on hand, for our rain water catchment project.
This is my review on the available literature relevant, and on hand, for our rain water catchment project.


===Basics on Rain Water Catchment===
=== Basics on Rain Water Catchment ===
One of the biggest current and future economic problems that our world is facing is a shortage of drinkable water. Having clean water is vital to the health and survival of our race. A big portion of waste in regards to water usage is in the home. A huge portion of our drinkable water is literally flushed down the toilet. We are going to cut down on our use of clean water by utilizing the natural energy source that the cycle of life provides us with: rain. We will be collecting rainwater in a system that we will design and build, and transfer that water to a house's plumbing to be used to flush the toilet. Though many people are becoming more conservative in regards to using the bathroom and avoiding water waste, many people are still using much more than necessary. For the people who cannot use outdoor, eco-friendly toilets, we will do our small part to help in conservation of the increasingly limited supply of drinkable water.  
 
One of the biggest current and future economic problems that our world is facing is a shortage of drinkable water. Having clean water is vital to the health and survival of our race. A big portion of waste in regards to water usage is in the home. A huge portion of our drinkable water is literally flushed down the toilet. We are going to cut down on our use of clean water by utilizing the natural energy source that the cycle of life provides us with: rain. We will be collecting rainwater in a system that we will design and build, and transfer that water to a house's plumbing to be used to flush the toilet. Though many people are becoming more conservative in regards to using the bathroom and avoiding water waste, many people are still using much more than necessary. For the people who cannot use outdoor, eco-friendly toilets, we will do our small part to help in conservation of the increasingly limited supply of drinkable water.
 
=== Potential design difficulties ===


===Potential design difficulties===
At our current level of understanding on the project our primary concern is to safely secure the storage devices in a manner that is easy to clean, understand, and that will be effective for our system. We are also aware that a more specialized and appropriate understanding is necessary for our success.
At our current level of understanding on the project our primary concern is to safely secure the storage devices in a manner that is easy to clean, understand, and that will be effective for our system. We are also aware that a more specialized and appropriate understanding is necessary for our success.


===Methods of rain water harvest===
=== Methods of rain water harvest ===
Rainwater can be captured (harvested)in many ways. The most commonly used method is by roof. All kinds of roof systems can be used for capture, but roofs with a pitch are much more efficient than flat roofs. The steeper the pitch the higher the efficiency. Gravity rules. Any slope can be used to capture rainwater with vastly different levels of cleanliness, efficiency, and setup and maintenance difficulties. For areas without a natural slope, or a roof, many varieties of structures can be built for rain capture.  
 
Rainwater can be captured (harvested)in many ways. The most commonly used method is by roof. All kinds of roof systems can be used for capture, but roofs with a pitch are much more efficient than flat roofs. The steeper the pitch the higher the efficiency. Gravity rules. Any slope can be used to capture rainwater with vastly different levels of cleanliness, efficiency, and setup and maintenance difficulties. For areas without a natural slope, or a roof, many varieties of structures can be built for rain capture.


===Designing interpretive materials===
=== Designing interpretive materials ===
The materials that our project will be using are similar to those of other rain water catchment systems. We will be utilizing a sloped roof, with a gutter drainage system, that will transfer the gathered rainwater down the conveyance into a first flush cycle, that we will create. This will then fill our large 50 gallon storage drums that will store the water for later use.  
 
The materials that our project will be using are similar to those of other rain water catchment systems. We will be utilizing a sloped roof, with a gutter drainage system, that will transfer the gathered rainwater down the conveyance into a first flush cycle, that we will create. This will then fill our large 50 gallon storage drums that will store the water for later use.
 
=== References ===


===References===
<Downey, Nate. Harvest the rain: how to enrich your life by seeing every storm as a resource. Santa Fe, N.M.: Sunstone Press, 2010.>
<Downey, Nate. Harvest the rain: how to enrich your life by seeing every storm as a resource. Santa Fe, N.M.: Sunstone Press, 2010.>


<Ryn, Sim. The toilet papers: recycling waste and conserving water. Sausalito, CA: Ecological Design Press, 1995.>
<Ryn, Sim. The toilet papers: recycling waste and conserving water. Sausalito, CA: Ecological Design Press, 1995.>


<Phipps, Marcus, and Jan Brace-Govan. "From Right to Responsibility: Sustainable Change in Water ." Journal of Public Policy & Marketing September (2011): 203-219.>
<Phipps, Marcus, and Jan Brace-Govan. "From Right to Responsibility: Sustainable Change in Water." Journal of Public Policy & Marketing September (2011): 203-219.>


== Literature Review by Colin Bourgeois ==


This is a literature review with information important for the J Gnarly site.


==Literature Review by Colin Bourgeois==
=== Rain Water Catchment Basics ===


This is a literature review with information important for the J Gnarly site.  
There are a differing types of rainwater catchment systems. This review will focus on using a roof for the catchment. Water will be collected from the roof of the house via gutters that are already in place. The research and literature reviewed is geared toward first flush systems and water storage. The water collected will be used for flushing the one indoor toilet in the house at the J Gnarly site.


===Rain Water Catchment Basics===
=== Basic Operation ===
There are a differing types of rainwater catchment systems. This review will focus on using a roof for the catchment.  Water will be collected from the roof of the house via gutters that are already in place. The research and literature reviewed is geared toward first flush systems and water storage. The water collected will be used for flushing the one indoor toilet in the house at the J Gnarly site.


===Basic Operation===
Rain water collected by the gutters will be gravity fed via PVC pipe in to a first flush device then into 50 gal food grade storage tanks. The water then will be gravity fed as needed into existing plumbing that fills up the toilet tank so that the existing float valve in the tank controls the water flow.
Rain water collected by the gutters will be gravity fed via PVC pipe in to a first flush device then into 50 gal food grade storage tanks. The water then will be gravity fed as needed into existing plumbing that fills up the toilet tank so that the existing float valve in the tank controls the water flow.


===Safety Concerns===
=== Safety Concerns ===
Water will be stored in 50 gallon drums at a height of 5 feet, each drum when filled with water to capacity will weigh approximately 500 lbs. <ref>Freed, Eric Corey. Green building & remodeling for dummies. Hoboken, N.J.: Wiley, 2008.</ref>  With a goal of 4 storage drums, finding a suitable solution to the stands to hold the drums (totaling 2000 lbs) will be challenging.


Water will be stored in 50 gallon drums at a height of 5 feet, each drum when filled with water to capacity will weigh approximately 500 lbs.<ref>Freed, Eric Corey. Green building & remodeling for dummies. Hoboken, N.J.: Wiley, 2008.</ref> With a goal of 4 storage drums, finding a suitable solution to the stands to hold the drums (totaling 2000 lbs) will be challenging.


===First Flush===
=== First Flush ===
The first flush device is used to clean the water of debris and harmful chemicals that the collected water flow into before going into the storage tanks.  The device should hold one gallon of water for every 100 sq. feet of catchment surface, in this case the roof.  <ref>Freed, Eric Corey. Green building & remodeling for dummies. Hoboken, N.J.: Wiley, 2008.</ref>
 
The device can be a standpipe; a PVC pipe with appropriate volume using the aforementioned rate, once the standpipe fills to capacity the water will then flow into the storage tanks.  At the bottom of the standpipe a drainage device lets water out at a constant trickle to ensure the diverted first flush water does not become stagnant and brackish.  <ref>Lancaster, Brad, and Joe Marshall. Rainwater harvesting for drylands. Tucson, Ariz.: Rainsource Press, 2006.</ref>


The first flush device is used to clean the water of debris and harmful chemicals that the collected water flow into before going into the storage tanks. The device should hold one gallon of water for every 100 sq. feet of catchment surface, in this case the roof.<ref>Freed, Eric Corey. Green building & remodeling for dummies. Hoboken, N.J.: Wiley, 2008.</ref>
The device can be a standpipe; a PVC pipe with appropriate volume using the aforementioned rate, once the standpipe fills to capacity the water will then flow into the storage tanks. At the bottom of the standpipe a drainage device lets water out at a constant trickle to ensure the diverted first flush water does not become stagnant and brackish.<ref>Lancaster, Brad, and Joe Marshall. Rainwater harvesting for drylands. Tucson, Ariz.: Rainsource Press, 2006.</ref>
Another device used for first flush is a flush tank. The tank functions the same way a stand pipe would except that a tank is used instead when a larger volume of water needs to be flushed.
Another device used for first flush is a flush tank. The tank functions the same way a stand pipe would except that a tank is used instead when a larger volume of water needs to be flushed.
Ball valve a floating ball valve can be used in the first flush device to ensure diverted water does not mix with water flowing into the storage tank. When the flush tank or pipe fills to capacity the ball is pushed into a junction or neck in the pipe or tank and prevents water from flowing into or out of the tank or pipe so long as it is full.<ref>Effects of first flush on rainwater quality [https://web.archive.org/web/20130910004000/http://www.irc.nl:80/page/29189 http://web.archive.org/web/20130910004000/http://www.irc.nl:80/page/29189]</ref>


Ball valve a floating ball valve can be used in the first flush device to ensure diverted water does not mix with water flowing into the storage tank.  When the flush tank or pipe fills to capacity the ball is pushed into a junction or neck in the pipe or tank and prevents water from flowing into or out of the tank or pipe so long as it is full.<ref>Effects of first flush on rainwater quality http://www.irc.nl/page/29189#information</ref>
Contamination factors


Contamination factors
Debris from the roof, bacteria, viruses and pollutants in the atmosphere.<ref>MECHELL, JUSTIN KEITH. EVALUATION OF CONTAMINANT MIXING IN
RAINWATER HARVESTING FIRST FLUSH DIVERTERS. Office of Graduate Studies of Texas A&M University. 2009.<ref>=== References ===


Debris from the roof, bacteria, viruses and pollutants in the atmosphere.
<references />
<ref>MECHELL, JUSTIN KEITH.  EVALUATION OF CONTAMINANT MIXING IN
RAINWATER HARVESTING FIRST FLUSH DIVERTERS. Office of Graduate Studies of Texas A&M University. 2009.
</ref>


===References===
American Rainwater Catchment Systems Association (ARCSA). 2008. Austin, TX.
{{Reflist}}
American Rainwater Catchment Systems Association (ARCSA). 2008. Austin, TX.  
Draft Rainwater Catchment Design and Installation Standards.
Draft Rainwater Catchment Design and Installation Standards.


Line 137: Line 155:
Science of The Total Environment, Volume 407, Issue 6, 1 March 2009, Pages 1834–1841
Science of The Total Environment, Volume 407, Issue 6, 1 March 2009, Pages 1834–1841


http://eatyouryard.info/rainwater/
[https://web.archive.org/web/20160707113735/http://eatyouryard.info:80/rainwater http://web.archive.org/web/20160707113735/http://eatyouryard.info:80/rainwater]


==Materials==
== Materials ==


<center>
<gallery>
<gallery>
File:TValve.jpg|3 way Tvalve
File:TValve.jpg|3 way Tvalve
Line 154: Line 172:
File:J-gnarly-3way-valve.jpg | First flush water flow regulator
File:J-gnarly-3way-valve.jpg | First flush water flow regulator
File:J-gnarly-float-valve.jpg | The float valve that we added to make our system function
File:J-gnarly-float-valve.jpg | The float valve that we added to make our system function
</gallery>
</gallery></center>
Not yet a complete list
 
*55 gallon, food quality storage drums
*3/4" pipe
*3/4" 90 degree elbows
*3/4" Valve Balls
*3/4" T valves
*4x4 Pressure Treated Lumber
*2x4 Pressure Treated Lumber
*Thread Seal Tape
*Iron Wool
*Silicon Caulking
*Racket ball
*hose clamps


* 55 gallon, food quality storage drums
* 70' of 3/4" pipe
* 3/4" 90 degree elbows
* 3/4" Valve Balls
* 3/4" T valves
* 4x4 Pressure Treated Lumber
* 2x4 Pressure Treated Lumber
* Thread Seal Tape
* Iron Wool
* Silicon Caulking
* Racket ball
* hose clamps


Tools used for Construction
Tools used for Construction


*Skill saw
* Skill saw
*Radial Arm Saw (A.K.A. chop saw)
* Radial Arm Saw (A.K.A. chop saw)
*Impacter screw driver
* Impacter screw driver
*Hammer
* Hammer
*level
* level
*Shovel and post diggers
* Shovel and post diggers
*Speed Square
* Speed Square
*hack saw  
* hack saw
*tape measure
* tape measure
*C-Clamp
* C-Clamp


== Costs ==
== Costs ==


Still in Process of adding all items.
<center>


{| class="wikitable sortable"
{| class="wikitable"
! Quantity !! Material !! Source !! Cost ($) !! Total ($)
! Quantity
! Material
! Source
! Cost ($)
! Total ($)
|-
| 4
| 55 gal Food Grade Drums
| Bien Padre Foods Inc.
| align="right" |25.00
| align="right" |Donated
|-
| 3
| Paint for the drums
| Arcata Ace
| align="right" |5.39
| align="right" |16.17
|-
| 11
| 80lb bag of concrete
| McKenny's Do It Best
| align="right" |3.79
| align="right" |41.69
|-
| 9
| 4x4x8 PT posts
| McKenny's Do It Best
| align="right" |7.39
| align="right" |66.51
|-
| 1
| 4x4x8 PT posts
| McKinleyville Ace
| align="right" |9.99
| align="right" |9.99
|-
| 1
| Thread Seal Tape
| McKinleyville Ace
| align="right" |2.59
| align="right" |2.59
|-
| 1
| Plug Clean Out
| Arcata Ace
| align="right" |1.79
| align="right" |1.79
|-
| 1
| Iron Wool
| Murphy's Markets Blue Lake
| align="right" |0.99
| align="right" |0.99
|-
| 14
| 90 degree slip to slip elbows
| Arcata Ace
| align="right" |0.71
| align="right" |9.23
|-
| 6
| 3 way T-valves
| Arcata Ace
| align="right" |1.42
| align="right" |8.52
|-
| 4
| Shutoff ball valves
| Arcata Ace
| align="right" |7.19
| align="right" |28.76
|-
| 3
| gutter strainers
| Nate, a Friend
| align="right" |3.99
| align="right" |Trade for Labor
|-
| 6
| slip to thread adapters
| Arcata Ace
| align="right" |2.59
| align="right" |15.54
|-
| 1
| 1/4" Copper Tubing, 6" length
| Personal Materials
| align="right" |2.99
| align="right" |Free
|-
| 1
| Stainless Steel Sheet
| Client Materials
| align="right" |2.00
| align="right" |Free
|-
|-
| 4 || 55 gal Food Grade Drums || Bien Padre Foods Inc.
| 1
|align="right"| 25.00
| Copper wire
|align="right"| Donated
| Personal Materials
|-
| align="right" |.50
| 3 || Paint for the drums|| Arcata Ace
| align="right" |Free
|align="right"| 5.39
|align="right"| 16.17
  |-
| 11 || 80lb bag of concrete|| McKenny's Do It Best
|align="right"| 3.79
|align="right"| 41.69
|-
| 9 || 4x4x8 PT posts|| McKenny's Do It Best
|align="right"| 7.39
|align="right"| 66.51
|-
| 1 || 4x4x8 PT posts|| McKinleyville Ace
|align="right"| 9.99
|align="right"| 9.99
|-
| 1 || Thread Seal Tape|| McKinleyville Ace
|align="right"| 2.59
|align="right"| 2.59
|-
| 1 || Plug Clean Out|| Arcata Ace
|align="right"| 1.79
|align="right"| 1.79
|-
| 1 || Iron Wool|| Murphy's Markets Blue Lake
|align="right"| 0.99
|align="right"| 0.99
|-
| 14 || 90 degree slip to slip elbows|| Arcata Ace
|align="right"| 0.71
|align="right"| 9.23
|-
| 6 || 3 way T-valves|| Arcata Ace
|align="right"| 1.42
|align="right"| 8.52
|-
| 4 || Shutoff ball valves|| Arcata Ace
|align="right"| 7.19
|align="right"| 28.76
|-
| 3 || gutter strainers|| Nate, a Friend
|align="right"| 3.99
|align="right"| Trade for Labor
|-
| 6 || slip to thread adapters|| Arcata Ace
|align="right"| 2.59
|align="right"| 15.54
|-
|-
| 1 || 1/4" Copper Tubing, 6" length|| Personal Materials
| 1
|align="right"|2.99
| Tube of Silicon Caulk
|align="right"|Free
| Client Materials
| align="right" |8.79
| align="right" |Free
|-
|-
|1||Stainless Steel Sheet||Client Materials
| 1
|align="right"|2.00
| CPVC, PVC, ABS Cement
|align="right"|Free
| Client Materials
| align="right" |6.00
| align="right" |Free
|-
|-
|1|| Copper wire|| Personal Materials
| 3
|align="right"|.50
| 20' length 3/4" PVC
|align="right"|Free
| Nate, a Friend
| align="right" |5.99
| align="right" |Trade for Labor
|-
|-
|1|| Tube of Silicon Caulk|| Client Materials
| 1
|align="right"|8.79
| 10' length 3/4" PVC
|align="right"|Free
| Nate, a Friend
| align="right" |2.79
| align="right" |Trade for Labor
|-
|-
|1||CPVC, PVC, ABS Cement|| Client Materials
| 25
|align="right"|6.00
| Miscellaneous 3/4" PVC fittings
|align="right"|Free
| Nate, a Friend
| align="right" |35.00
| align="right" |Trade for Labor
|-
|-
|3|| 20' length 3/4" PVC||Nate, a Friend
| 1
|align="right"|5.99
| 7' of 4" ABS pipe
|align="right"|Trade for Labor
| Client Materials
| align="right" |14.00
| align="right" |Free
|-
|-
|1|| 10' length 3/4" PVC||Nate, a Friend
| 1
|align="right"|2.79
| Air conditioner float valve
|align="right"|Trade for Labor
| Ace Hardware
| align="right" |3.99
| align="right" |3.99
|-
|-
|25|| Miscellaneous 3/4" PVC fittings|| Nate, a Friend
|align="right"|35.00
|align="right"|Trade for Labor
|-
|-
|1|| 8' strip of galvanized metal|| Client Materials
| 1
|align="right"|5.00
| 8' strip of galvanized metal
|align="right"|Free
| Client Materials
| align="right" |5.00
| align="right" |Free
|-
|-
|8|| Miscellaneous Pieces of Scrap Wood|| Personal and Client Materials
| 8
|align="right"|10.00
| Miscellaneous Pieces of Scrap Wood
|align="right"|Free
| Personal and Client Materials
| align="right" |10.00
| align="right" |Free
|-
|-
|-class="sortbottom"
|- class="sortbottom"
|colspan="4" align="right" | '''Total Cost'''  
| colspan="4" align="right" |'''Total Cost'''
|align="right"| '''$201.78'''  
| align="right" |''$205.77''
|}
|}
</center>


== Discussion ==
== Discussion ==
*This section is for people to submit constructive advice on improving our system, or to ask questions and give any comments to the builders.
 
* This section is for people to submit constructive advice on improving our system, or to ask questions and give any comments to the builders.


== Conclusions ==
== Conclusions ==
 
Our project has come together quite nicely. We have ended with a working system and still plan on adding to and improving it in the near future. We have had a lot of fun designing and building this system and have not had to many set backs. A lot of our process was fairly simple because we did a lot of planning prior to construction. There were however a few hiccups when we were working. When we started building the base for the storage tanks it was a little difficult to get the 4x4 posts level and plumb in the ground. This is partly due to us trying to connect 3 pillars before sinking them into the ground, thinking that it would save us time. With the materials available to us it was a little difficult to do this quick and accurate so we had to slow down our process in order to end with quality work. Once we started doing the posts individually our efficiency climbed. Another problem that we ran into was when it came to the original float valve. We had pretty good head but with the current plumbing on the toilet we did not have enough psi to force the water through the system. It would flow through all of the piping, but fell short when it came to the last step. So we switched around some of the house plumbing and brought up the water pipe to give it more head. This also failed, and that is when we settled on switching the float to a system that requires less psi. The system now functions quite well in gathering water, and slowly but surely fills the toilet. This project fit perfectly into the rule of 3's taught in business classes. The project cost 3 times as much, and took 3 times as long as we originally thought. In the end though, we have a working system which will in fact pay itself back soon seeing as the labor was free.
Our project has come together quite nicely. We have ended with a working system and still plan on adding to and improving it in the near future. We have had a lot of fun designing and building this system and have not had to many set backs. A lot of our process was fairly simple because we did a lot of planning prior to construction. There were however a few hiccups when we were working. When we started building the base for the storage tanks it was a little difficult to get the 4x4 posts level and plumb in the ground. This is partly due to us trying to connect 3 pillars before sinking them into the ground, thinking that it would save us time. With the materials available to us it was a little difficult to do this quick and accurate so we had to slow down our process in order to end with quality work. Once we started doing the posts individually our efficiency climbed. Another problem that we ran into was when it came to the original float valve. We had pretty good head but with the current plumbing on the toilet we did not have enough psi to force the water through the system. It would flow through all of the piping, but fell short when it came to the last step. So we switched around some of the house plumbing and brought up the water pipe to give it less gravitational resistance. This also failed, and that is when we settled on switching the float to a system that requires less psi. The system now functions quite well in gathering water, and slowly but surely fills the toilet. This project fit perfectly into the rule of 3's taught in business classes. The project cost 3 times as much, and took 3 times as long as we originally thought. In the end though, we have a working system which will in fact pay itself back soon seeing as the labor was free.
 
=== Final Product ===
 
<center>
 
{{Video|Cx9oz0LuLpc&feature}}
 
</center>
 
<center>
 
{{Video|hMcGk-5RwM8&feature}}
 
</center>


== Future Improvements to the System ==
== Future Improvements to the System ==


After a chance meeting with an experienced rainwater collection builder an inexpensive solution for increasing the psi of the system is going to be designed and hopefully implemented. The solution as it is preliminarily understood is that an empty drum or two will be placed on top of the existing drums and connected to the drums below and sealed air tight while all drums are empty of water. As the drums fill with water and decrease the amount of air space the trapped air will increase in pressure. As this design is currently understood questions arrise as to whether enough air pressure can be generated to increase water pressure substantially and secondly, will air pressure be contained while the rainwater inlet pipe does not having water flowing through it?  
After a chance meeting with an experienced rainwater collection builder an inexpensive solution for increasing the psi of the system is going to be designed and hopefully implemented. The solution as it is preliminarily understood is that an empty drum or two will be placed on top of the existing drums and connected to the drums below and sealed air tight while all drums are empty of water. As the drums fill with water and decrease the amount of air space the trapped air will increase in pressure. As this design is currently understood questions arrise as to whether enough air pressure can be generated to increase water pressure substantially and secondly, will air pressure be contained while the rainwater inlet pipe does not having water flowing through it?


If enough water pressure can be generated a FluidMaster 400A model toilet fill valve will be installed so the toilet tank will fill faster and quieter.
If enough water pressure can be generated a FluidMaster 400A model toilet fill valve will be installed so the toilet tank will fill faster and quieter.


In light of potentially being able to increase the pressure of the system by rearranging the drums and adding another drum we have decided not to install a support railing around the drums incase of earthquakes because it would be just be taken down in a matter of days and not worth the time and materials.
In light of potentially being able to increase the pressure of the system by rearranging the drums and adding another drum we have decided not to install a support railing around the drums incase of earthquakes because it would be just be taken down in a matter of days and not worth the time and materials.


If the pressure increase system does not work a custom made float valve mechanism is going to be designed in the next couple months, before the rainy fall season, with the hope that it can be 3D printed and will decrease the toilet tank fill time by improving the flow rate into the toilet.
If the pressure increase system does not work a custom made float valve mechanism is going to be designed in the next couple months, before the rainy fall season, with the hope that it can be 3D printed and will decrease the toilet tank fill time by improving the flow rate into the toilet.


==Progress Images==
== Lessons Learned ==


It was super helpful to leave plumbing in place with out glue until the system was ready to be tested because modifications could be made with out having to cut and replace parts.
A minimum of 2.5 psi is required to operate the toilet using a commercial toilet fill valve. The Fluid Master 400A with a low pressure rubber disc available form the manufacturer is the lower pressure requirement this team found for a fill valve. 5' 10"' is the minimum head requirement for a 2.5 psi system.
When installing posts set them in the ground and one by one instead of connecting three and trying to install them at once.
<center>
{{Video|7DcRB_LxPYc&feature}}
</center>
== Progress Images ==


<gallery>
<gallery>
File:J-gnarly-system-front.jpg | The front gutters wrapping around to the back of the house.
File:J-gnarly-system-front.jpg | The front gutters wrapping around to the back of the house.
File: sidewall.jpg | The piping from on the side of house leading to storage tanks
File: sidewall.jpg | The piping from on the side of house leading to storage tanks
File:Short gutter to pipe connection .JPG | Short gutter to pipe connection
File:Short gutter to pipe connection.JPG | Short gutter to pipe connection
  File:Short gutter to pipe connection top view.JPG | Short gutter to pipe connection top view
  File:Short gutter to pipe connection top view.JPG | Short gutter to pipe connection top view
File:J-gnarly-firstflush1.jpg | Top of first flush.
File:J-gnarly-firstflush1.jpg | Top of first flush.
Line 323: Line 432:
File: tanksoverhead2.jpg | This shows the pipe that is going into the first flush and the tanks.
File: tanksoverhead2.jpg | This shows the pipe that is going into the first flush and the tanks.
File: tanksoverhead3.jpg | Filling the gutters with the hose to test the system without rain.
File: tanksoverhead3.jpg | Filling the gutters with the hose to test the system without rain.
File: tanksoverhead.jpg |  
File: tanksoverhead.jpg |
File:J-gnarly-connecting-plumbing.jpg |  
File:J-gnarly-connecting-plumbing.jpg | Opening the valve from storage drums to the plumbing in the house, testing for the first time.
File: tankconnections1.jpg | The connections on the bottom of the tank that lead to the house.
File: tankconnections1.jpg | The connections on the bottom of the tank that lead to the house.
File: tankconnections2.jpg | This is the shutoff, and tank draining system.
File: tankconnections2.jpg | This is the shutoff, and tank draining system.
File: J-gnarly-into-house.jpg | The piping going through the exterior wall.
File: J-gnarly-into-house.jpg | The piping going through the exterior wall.
File:First water closet set up.JPG | First version of the water closet set up  
File:First water closet set up.JPG | First version of the water closet set up
File: shutoffvalves.jpg |
File: shutoffvalves.jpg |
File:J-gnarly-into-toilet.jpg | System working.
File:J-gnarly-into-toilet.jpg | System working.
File:Second version of float valve setup.JPG | Improved float valve system
File:Second version of float valve setup.JPG | Improved float valve system
File:J-gnarly-motivation.jpg |
File:J-gnarly-Colin-finaltouches.jpg | Colin doing final touch up in fancy duds
File:J-gnarly-Kyle-finaltouchup.JPG | Kyle doing final touch up in fancy duds
File:J-gnarly-motivation.jpg | Motivation
</gallery>
</gallery>


== References ==
== References ==
*[[Engineering 305]]
 
* [[Engineering 305]]


== Contact details ==
== Contact details ==
*[[User:Kyle_basnett|Kyle Basnett]]
*[[User:Bourgeois|Bourgeois]]


<!-- Do add additional, appropriate categories. See http://www.appropedia.org/Appropedia:CategoryTree for ideas. -->
* [[User:Kyle basnett|Kyle Basnett]]
[[Category:Projects]]
* [[User:Bourgeois|Colin Bourgeois]]
 
<!-- Do add additional, appropriate categories. See https://www.appropedia.org/Appropedia:CategoryTree for ideas. -->
 
{{Page data
| keywords = first flush, rainwater catchment, water storage, Concrete, Plastic
| sdg = SDG03 Good health and well-being, SDG06 Clean water and sanitation, SDG11 Sustainable cities and communities, SDG12 Responsible consumption and production
| published = 2013
| organizations = Cal Poly Humboldt, Engr305 Appropriate Technology
| license = CC-BY-SA-3.0
| language = en
}}
 
[[Category:Engr305 Appropriate Technology]]
[[Category:Engr305 Appropriate Technology]]
[[Category:Concrete]]
[[Category:Plastic]]

Latest revision as of 13:47, 28 February 2024

J-gnarly-system.jpg
FA info icon.svg Angle down icon.svg Project data
Authors Kyle Basnett
Colin Bourgeois
Status Deployed
Completed 2013
Made Yes
Replicated No
Cost USD 205.77
OKH Manifest Download

A rainwater catchment system will be built on a house in Blue Lake of Humboldt Country in California. The rainwater will be carried from the gutters to storage tanks for use in flushing the indoor toilet and watering the garden. Kyle Basnett and Colin Bourgeois are working on this project as part of the Cal Poly Humboldt's Engineering 305 course in Appropriate Technology.

Project Goals[edit | edit source]

  1. Design and install a safe, easy to use and maintainable rain water catchment system.
  2. Acquire water storage containers for 200 gallons of rainwater storage.
  3. Connect the rainwater catchment system to the toilet tank for a gravity fed rainwater toilet.
  4. Design and install devices that will ensure water damage does not occur.

Criteria[edit | edit source]

The following criteria, constraints and weight of importance will help guide us through the designing and building process of this project. This list was compiled by Colin Bourgeois, Kyle Basnett and our client J Gnarly.

Criteria Constraints Weight
(1-10)
Function Collects and stores rainwater. 10
Safety Does not pose a safety risk to people or the house 9
Maintanence No More than 15 min/week cleaning and maintaining 8
Budget Spend less than $200 7
Asthetics Needs to look nice 5
Reliability Works every time 9
Usability Flushes and fills like a conventional toilet. Simple to switch from rainwater fill to conventional water fill 8

Design[edit | edit source]

The roof of the house is asphalt shingle and the area is approximately 1400 square feet, since the roof is asphalt the rainwater collected from will not be used for drinking, instead it will be used to water the garden and flush the toilet. 3/4" PVC pipe will transport the water via gravity form the gutters to the first flush device at the rear of the house. The first flush device has a 10 gallon capacity, the literature on rainwater collection systems calls for 10 gallons of first flush capacity for every 1000 square feet of catchment surface (generally the roof). With 1400 square feet of water catchment surface it will take.3 inches or 7.5 mm of rain to fill the storage drums to capacity with 220 gallons of rainwater.

See the Progress Images section for pictures of the components described below

First Flush System[edit | edit source]

The first flush for this system is 10 gallons rather than the recommend 14 because the rainwater is being used for applications not requiring total debris removal, also the frequency of rain in the area and the lack of debris that collects in the gutters make for little build up of debris on the roof. Water continually drains from the first flush system at a rate of 2 gallons an hour, this rate is slow enough that significant rainwater will not be lost from collection and fast enough that it will drain completely before another major rain fall. Once the first flush collects 10 gallons of rainwater a racquet ball, floating on top of the water in the 4 inch ABS pipe is pushed by the water into a 2 inch ABS pipe and seals off the first flush, preventing additional water from entering and forcing the water to flow into the 3\4" PVC pipe connected to the storage drums.

Storage System[edit | edit source]

Four 55 gallon food grade plastic drums painted green to prevent algae growth due to sunlight sit vertically on top of a sturdy platform and stand just behind the house by the bathroom. The stand is constructed from 9 pressure treated 4x4s and each one is set 2 feet deep in the ground with 100 pounds of concrete. A pressure treated 4x4 and 2x4 platform sits on top of the plum and level stand holding the storage drums at a height of 5 feet 9 inches. The drums are connected on the bottom through their bungs by 3/4" PVC and each tank has a 1/32 inch hole drilled in the top allowing the drums to quickly equalize their water levels. The PVC connecting the drums has two water outlet pipes; one goes to a ball valve and a then a hose fitting to water the garden, the other outlet goes to a ball valve and then into the house to connect with existing plumbing.

Plumbing[edit | edit source]

The existing plumbing for the toilet from the water main and the rainwater plumbing both have ball valves accessible from the kitchen in the water closet so that the toilet can be flushed with water from the main if the rainwater tanks run dry. Typical water pressure in modern houses is around 40 psi and the float valve that fills the toilet tank when empty requires a 20 psi minimum to operate, this rainwater catchment system has a max head of approximately 5 feet, giving the system a max psi of approximately 2 psi. The storage tanks are set on top of the stand that we built to keep them high and level. The tanks are connected together on the bottom and sealed so that they will equalize. The water is then allowed to either head into the house, or into our secondary release valve. We have situated a shut off valve that can have a hose attached to it for directed water distribution. The piping into the house has a shutoff valve for the houses main water, and to shutoff our rainwater, this allows for switching between water sources depending on stored water levels. The two separate pipes connect via T junction after the ball valves and go into a conventional toilet hose then into a 1/4" copper pipe to a float valve meant for an air conditioner. The float valve has the float removed and the float ball rod is connected to the rod for the conventional and existing fill valve device. This custom device was fitted to the toilet with stainless steal sheet and copper wire and is firmly in place. The toilet tank fills at a rate of 5 minutes a gallon, this rate is slower than desired and will be addressed in the coming months, see the Lessons Learned section for more information about this.


Proposed time line[edit | edit source]

  • March 2nd - Have a current list of necessary materials, and goals.
  • March 4th - Have all main materials.
  • March 8th - Have design refined.
  • March 10th - First installation (1st trial).
  • March 17th - Work on refined plan and adjust potential problems.
  • March 29th - Test and discuss quality of work.

Literature Review by Kyle Basnett[edit | edit source]

This is my review on the available literature relevant, and on hand, for our rain water catchment project.

Basics on Rain Water Catchment[edit | edit source]

One of the biggest current and future economic problems that our world is facing is a shortage of drinkable water. Having clean water is vital to the health and survival of our race. A big portion of waste in regards to water usage is in the home. A huge portion of our drinkable water is literally flushed down the toilet. We are going to cut down on our use of clean water by utilizing the natural energy source that the cycle of life provides us with: rain. We will be collecting rainwater in a system that we will design and build, and transfer that water to a house's plumbing to be used to flush the toilet. Though many people are becoming more conservative in regards to using the bathroom and avoiding water waste, many people are still using much more than necessary. For the people who cannot use outdoor, eco-friendly toilets, we will do our small part to help in conservation of the increasingly limited supply of drinkable water.

Potential design difficulties[edit | edit source]

At our current level of understanding on the project our primary concern is to safely secure the storage devices in a manner that is easy to clean, understand, and that will be effective for our system. We are also aware that a more specialized and appropriate understanding is necessary for our success.

Methods of rain water harvest[edit | edit source]

Rainwater can be captured (harvested)in many ways. The most commonly used method is by roof. All kinds of roof systems can be used for capture, but roofs with a pitch are much more efficient than flat roofs. The steeper the pitch the higher the efficiency. Gravity rules. Any slope can be used to capture rainwater with vastly different levels of cleanliness, efficiency, and setup and maintenance difficulties. For areas without a natural slope, or a roof, many varieties of structures can be built for rain capture.

Designing interpretive materials[edit | edit source]

The materials that our project will be using are similar to those of other rain water catchment systems. We will be utilizing a sloped roof, with a gutter drainage system, that will transfer the gathered rainwater down the conveyance into a first flush cycle, that we will create. This will then fill our large 50 gallon storage drums that will store the water for later use.

References[edit | edit source]

<Downey, Nate. Harvest the rain: how to enrich your life by seeing every storm as a resource. Santa Fe, N.M.: Sunstone Press, 2010.>

<Ryn, Sim. The toilet papers: recycling waste and conserving water. Sausalito, CA: Ecological Design Press, 1995.>

<Phipps, Marcus, and Jan Brace-Govan. "From Right to Responsibility: Sustainable Change in Water." Journal of Public Policy & Marketing September (2011): 203-219.>

Literature Review by Colin Bourgeois[edit | edit source]

This is a literature review with information important for the J Gnarly site.

Rain Water Catchment Basics[edit | edit source]

There are a differing types of rainwater catchment systems. This review will focus on using a roof for the catchment. Water will be collected from the roof of the house via gutters that are already in place. The research and literature reviewed is geared toward first flush systems and water storage. The water collected will be used for flushing the one indoor toilet in the house at the J Gnarly site.

Basic Operation[edit | edit source]

Rain water collected by the gutters will be gravity fed via PVC pipe in to a first flush device then into 50 gal food grade storage tanks. The water then will be gravity fed as needed into existing plumbing that fills up the toilet tank so that the existing float valve in the tank controls the water flow.

Safety Concerns[edit | edit source]

Water will be stored in 50 gallon drums at a height of 5 feet, each drum when filled with water to capacity will weigh approximately 500 lbs.[1] With a goal of 4 storage drums, finding a suitable solution to the stands to hold the drums (totaling 2000 lbs) will be challenging.

First Flush[edit | edit source]

The first flush device is used to clean the water of debris and harmful chemicals that the collected water flow into before going into the storage tanks. The device should hold one gallon of water for every 100 sq. feet of catchment surface, in this case the roof.[2] The device can be a standpipe; a PVC pipe with appropriate volume using the aforementioned rate, once the standpipe fills to capacity the water will then flow into the storage tanks. At the bottom of the standpipe a drainage device lets water out at a constant trickle to ensure the diverted first flush water does not become stagnant and brackish.[3] Another device used for first flush is a flush tank. The tank functions the same way a stand pipe would except that a tank is used instead when a larger volume of water needs to be flushed. Ball valve a floating ball valve can be used in the first flush device to ensure diverted water does not mix with water flowing into the storage tank. When the flush tank or pipe fills to capacity the ball is pushed into a junction or neck in the pipe or tank and prevents water from flowing into or out of the tank or pipe so long as it is full.[4]

Contamination factors

Debris from the roof, bacteria, viruses and pollutants in the atmosphere.<ref>MECHELL, JUSTIN KEITH. EVALUATION OF CONTAMINANT MIXING IN RAINWATER HARVESTING FIRST FLUSH DIVERTERS. Office of Graduate Studies of Texas A&M University. 2009.<ref>=== References ===

  1. Freed, Eric Corey. Green building & remodeling for dummies. Hoboken, N.J.: Wiley, 2008.
  2. Freed, Eric Corey. Green building & remodeling for dummies. Hoboken, N.J.: Wiley, 2008.
  3. Lancaster, Brad, and Joe Marshall. Rainwater harvesting for drylands. Tucson, Ariz.: Rainsource Press, 2006.
  4. Effects of first flush on rainwater quality http://web.archive.org/web/20130910004000/http://www.irc.nl:80/page/29189

American Rainwater Catchment Systems Association (ARCSA). 2008. Austin, TX. Draft Rainwater Catchment Design and Installation Standards.

Prasanna Egodawatta, Evan Thomas, Ashantha Goonetilleke Understanding the physical processes of pollutant build-up and wash-off on roof surfaces Science of The Total Environment, Volume 407, Issue 6, 1 March 2009, Pages 1834–1841

http://web.archive.org/web/20160707113735/http://eatyouryard.info:80/rainwater

Materials[edit | edit source]

  • 55 gallon, food quality storage drums
  • 70' of 3/4" pipe
  • 3/4" 90 degree elbows
  • 3/4" Valve Balls
  • 3/4" T valves
  • 4x4 Pressure Treated Lumber
  • 2x4 Pressure Treated Lumber
  • Thread Seal Tape
  • Iron Wool
  • Silicon Caulking
  • Racket ball
  • hose clamps

Tools used for Construction

  • Skill saw
  • Radial Arm Saw (A.K.A. chop saw)
  • Impacter screw driver
  • Hammer
  • level
  • Shovel and post diggers
  • Speed Square
  • hack saw
  • tape measure
  • C-Clamp

Costs[edit | edit source]

Quantity Material Source Cost ($) Total ($)
4 55 gal Food Grade Drums Bien Padre Foods Inc. 25.00 Donated
3 Paint for the drums Arcata Ace 5.39 16.17
11 80lb bag of concrete McKenny's Do It Best 3.79 41.69
9 4x4x8 PT posts McKenny's Do It Best 7.39 66.51
1 4x4x8 PT posts McKinleyville Ace 9.99 9.99
1 Thread Seal Tape McKinleyville Ace 2.59 2.59
1 Plug Clean Out Arcata Ace 1.79 1.79
1 Iron Wool Murphy's Markets Blue Lake 0.99 0.99
14 90 degree slip to slip elbows Arcata Ace 0.71 9.23
6 3 way T-valves Arcata Ace 1.42 8.52
4 Shutoff ball valves Arcata Ace 7.19 28.76
3 gutter strainers Nate, a Friend 3.99 Trade for Labor
6 slip to thread adapters Arcata Ace 2.59 15.54
1 1/4" Copper Tubing, 6" length Personal Materials 2.99 Free
1 Stainless Steel Sheet Client Materials 2.00 Free
1 Copper wire Personal Materials .50 Free
1 Tube of Silicon Caulk Client Materials 8.79 Free
1 CPVC, PVC, ABS Cement Client Materials 6.00 Free
3 20' length 3/4" PVC Nate, a Friend 5.99 Trade for Labor
1 10' length 3/4" PVC Nate, a Friend 2.79 Trade for Labor
25 Miscellaneous 3/4" PVC fittings Nate, a Friend 35.00 Trade for Labor
1 7' of 4" ABS pipe Client Materials 14.00 Free
1 Air conditioner float valve Ace Hardware 3.99 3.99
1 8' strip of galvanized metal Client Materials 5.00 Free
8 Miscellaneous Pieces of Scrap Wood Personal and Client Materials 10.00 Free
Total Cost $205.77

Discussion[edit | edit source]

  • This section is for people to submit constructive advice on improving our system, or to ask questions and give any comments to the builders.

Conclusions[edit | edit source]

Our project has come together quite nicely. We have ended with a working system and still plan on adding to and improving it in the near future. We have had a lot of fun designing and building this system and have not had to many set backs. A lot of our process was fairly simple because we did a lot of planning prior to construction. There were however a few hiccups when we were working. When we started building the base for the storage tanks it was a little difficult to get the 4x4 posts level and plumb in the ground. This is partly due to us trying to connect 3 pillars before sinking them into the ground, thinking that it would save us time. With the materials available to us it was a little difficult to do this quick and accurate so we had to slow down our process in order to end with quality work. Once we started doing the posts individually our efficiency climbed. Another problem that we ran into was when it came to the original float valve. We had pretty good head but with the current plumbing on the toilet we did not have enough psi to force the water through the system. It would flow through all of the piping, but fell short when it came to the last step. So we switched around some of the house plumbing and brought up the water pipe to give it less gravitational resistance. This also failed, and that is when we settled on switching the float to a system that requires less psi. The system now functions quite well in gathering water, and slowly but surely fills the toilet. This project fit perfectly into the rule of 3's taught in business classes. The project cost 3 times as much, and took 3 times as long as we originally thought. In the end though, we have a working system which will in fact pay itself back soon seeing as the labor was free.

Final Product[edit | edit source]

Future Improvements to the System[edit | edit source]

After a chance meeting with an experienced rainwater collection builder an inexpensive solution for increasing the psi of the system is going to be designed and hopefully implemented. The solution as it is preliminarily understood is that an empty drum or two will be placed on top of the existing drums and connected to the drums below and sealed air tight while all drums are empty of water. As the drums fill with water and decrease the amount of air space the trapped air will increase in pressure. As this design is currently understood questions arrise as to whether enough air pressure can be generated to increase water pressure substantially and secondly, will air pressure be contained while the rainwater inlet pipe does not having water flowing through it?

If enough water pressure can be generated a FluidMaster 400A model toilet fill valve will be installed so the toilet tank will fill faster and quieter.

In light of potentially being able to increase the pressure of the system by rearranging the drums and adding another drum we have decided not to install a support railing around the drums incase of earthquakes because it would be just be taken down in a matter of days and not worth the time and materials.

If the pressure increase system does not work a custom made float valve mechanism is going to be designed in the next couple months, before the rainy fall season, with the hope that it can be 3D printed and will decrease the toilet tank fill time by improving the flow rate into the toilet.

Lessons Learned[edit | edit source]

It was super helpful to leave plumbing in place with out glue until the system was ready to be tested because modifications could be made with out having to cut and replace parts.

A minimum of 2.5 psi is required to operate the toilet using a commercial toilet fill valve. The Fluid Master 400A with a low pressure rubber disc available form the manufacturer is the lower pressure requirement this team found for a fill valve. 5' 10"' is the minimum head requirement for a 2.5 psi system.

When installing posts set them in the ground and one by one instead of connecting three and trying to install them at once.

Progress Images[edit | edit source]

References[edit | edit source]

Contact details[edit | edit source]


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