Hand washing is an essential part to maintain proper hygiene and to prevent the spread of sickness. In places that do not have access to running water do not have the ability to frequently wash their hands and increase the chance of sickness to spread. With a portable easy to use unit that uses a limited amount of water to be able to have in a village or house in a place with out access to running water could help prevent spread of sicknesses. Current solution is to use a larger jug hanging from a tree for a small town or village to share.

Bill of Materials[edit | edit source]

  1. PLA Plastic Filament - Approx: 200g Cost: ~$4
  2. Rubber O-Rings - 2: 3/4" ID x 15/161" OD Cost: $1
  3. Electrical Tap - 4" Cost:$0.25
  4. Common Used Bottle 12oz to 2L - Garbage Cost: Free

Total Cost: $5.25

Tools needed[edit | edit source]

  1. MOST Delta RepRap or similar RepRap 3-D printer

Technical Specifications and Assembly Instructions[edit | edit source]

Used 2 Liter Bottle Holder by (c) 2013 Laird Popkin, based on Credit to eagleapex for creating and then deleting

OpenSCAD Files[edit | edit source]

Files available at [[1]]

Printable Stl files[edit | edit source]


File:Knob SmallerD.scad

Print Instructions[edit | edit source]

For all printed components

Material: PLA

Layer Height: 0.15mm

Shell Thickness: 4mm

Fill Density: 10%

Print Speed: 110 mm/s

Printing Temperature: 205 C

Supports are Necessary

Total Printing Time: 10 hours

Assembly time: <5min

Assembly Instructions[edit | edit source]

  1. Materials: 2 Printed Pieces, Electrical Tape, 2 O-Rings, Bottle.
  2. The assembly is very straight forward from looking at the pictures.

Once the Printing is done take 1 of the two o-rings and put it around the end of the bottle so if the cap was screwed back on there is a good seal. Take the other o-ring and put it around the insert where the groove is. Roll the o-ring into place using a table or flat surface. Apply the electrical tape around the o-ring to create a tighter seal and hold the o-ring into place.

Common Problems and Solutions[edit | edit source]

  • Water leaking out is a common problem even when the knob is all the way in. The solution is to add more electrical but the knob will be harder to move in and out.

Cost savings[edit | edit source]

  1. Total Cost of Print: $5.25
  2. The closest online equivalent is at least $225
  3. Savings: $219.75
  4. Precent Reduction: 97.6%

Benefited Internet Communities[edit | edit source]

  1. Blue Planet Network
  2. ACTS
  3. Bloodwater
  4. Care
  5. Charity:Water .


Discussion[View | Edit]

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