RM Borehole and Well Hand Pumps

FAQ


How can a piston pump operate without rigid lift rods? 

Tension on the webbing completes the pressure stroke. Gravity pull it back down. The piston plunger is a 1 m length heavy-walled stainless steel pipe. This and the foot valve has enough weight to complete the return stroke

Won't the webbing stretch and wear? 

No. The webbing is a certified cargo strop material, rated to 1600 kg. Stretch is minimal and is automatically adjusted in the piston stroke which is operational over a very long stroke-range.

The webbing runs through low-friction plastic guides. Our extensive testing shows that webbing and guide wear is very minimal.