About this device
Ram Pump 1.jpg
Keywords 3D printing, hydram, hydraulics, ram pump, water, osat, Bottle, Glue, Plastic
Uses development, industry
Authors Nick Buday
Status Designed
Made? Yes
Replicated? No
Published 2019
Designed in Michigan, United States
Affiliations MTU
Cost USD $ 13.80
SDGs SDG06 Clean water and sanitation
SDG08 Decent work and economic growth
License data
Hardware CC BY-SA 4.0
Instructions data
Manufacturing files https://www.youmagine.com/designs/777-osat-ram-pump
Translation data

This OSAT project is the design and prototyping of a hydraulic ram pump. This pump features no motorized parts and can be left unattended for extended duration with minimal upkeep. This pump is designed to allow someone in an area with hills with a water source far away. The ram pump does have a lot of waste water compared to how much it pumps, so it is ideal to place the waste outlet into a natural occurring water source.

Bill of Materials[edit | edit source]

  1. Standard Pop Bottle (~$2 USD)
  2. Super Glue (~$5 USD)
  3. Knife or cutting edge to clean up print if need be
  4. 3D Printed Parts
    1. [Link to FreeCad file and STLs]

Tools needed[edit | edit source]

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

Skills and knowledge needed[edit | edit source]

Technical Specifications and Assembly Instructions[edit | edit source]

  1. [[[Media:Ram Pump Assembly.pdf|Ram Pump Assembly]]]
  2. Print time ~~18 hours
  3. Assembly time ~~30 min

Common Problems and Solutions[edit | edit source]

  • To avoid trouble with assembly, use the knife to smooth the parts till they fit "snug".
  • Highly recommended to print the adapters and restrictions at layer height of 0.3 mm
  • Highly recommended to print the pump bodies at layer height of 0.2 mm
  • Highly recommended to print the threads at layer height of 0.1 mm
  • When using super glue, be careful not to overdue it. Too much glue can clog areas of the pump. Just keep a towel or rag handy to wipe excess glue in some areas.
  • If the pump is struggling to pump water, make sure the source for the inlet is significantly higher than the pump (at least 1 meter)

Cost savings[edit | edit source]

  1. Material Costs total ~~$13.8 USD
    • Printinf cost ~~$6.8 USD
    • Resources cost ~~$7 USD
  2. Commercial 1" Ram Pump ~~$165 USD[1]
  3. Savings
    • ~~$151.2 USD in savings
    • ~~ 91% in savings

Benefited Internet Communities[edit | edit source]

  • Engineers Without Borders[2]
  • The Water Project[3]
  • Water For People[4]
  • Solea Water[5]
  • WaterAid [6]

References[edit | edit source]


  1. web page: Bernoulli's principle, Available: https://en.wikipedia.org/wiki/Bernoulli%27s_principle