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→Technical specification: additional info from "Low Cost Handpumps" RWSN field note
==Technical specification==
====Design====
* Cylinder diameter: 3.5 inch and 5 inch (90mm - 130mm)
* Stroke: variable
* Yield: (75 watt input, at 5 m head)~ 4.5 m³/hour
* Population/Area served: 0.25 hectare
* Type of well: collapsible tube well or dug well
====Manufacturing and Materials ====
Treadle pumps can be manufactured locally in simple metalworking shops. The treadles and support structure are made of locally available, inexpensive material, such as bamboo. All components (or junction box) are made from mild steel; Piston-mild steel with plastic seal (cup Seal); foot valve-leather flap; rising main-PVC pipe or bamboo; various types of screens are used.
====Installation====
The installation of the Treadle pump is easy and does not need any lifting equipment or special tools. The drillers who sink the tube
well with the sludger method also install the pump.
====Operation====
====Maintenance====
If designed correctly, treadle pumps can be easily maintained with standard replacement parts available in local markets at a low cost. ====Manufacturing ====Treadle pumps All repairs can be manufactured locally in simple metalworking shops. The treadles and support structure are made done without the use of locally available, inexpensive material, such as bambootools.
==Cost==