The tube well casing houses the inlet, cylinder, piston valves and rising main of a “down-the-hole” type hand pump. Casing to support the external surfaces of the borehole against collapse may be needed, either temporarily or permanently, and is often made of PVC pipe, which is both cheap and inert. Seepage down the tube well bore is prevented by the sanitary seal. Seepage from the ground above the aquifer is excluded by the lengths of plain casing. Water to be pumped is admitted through slots in the lower lengths of casing.
Water abstracted from aquifers in relatively soft ground usually contains sand or silt particles, which are liable to cause rapid wear to pump valves and cylinders. Methods of preventing these particles from reaching the pump are of two general types, screening and sand/gravel packing.
Feature of Service: Pump high amout of water. No extra electricity uses. Can be used in the place for easy availabilty of ground water. Operate with easy Hand