Hand pump is on the right. (Customer photo). • Our EZ Well Hand Pump Piston has a Ultra slim profile of 1 5/8" a t the connecting couplers (y ou will need only 1 5/8" clearance from ground level down to water) and it uses only 1" pipe that goes into your well, with a 1/2" Pumping pipe. It's a pipe within a pipe system.