CRI submersible pumps in open wells pumps Coimbatore he pump sets works up to suctions and priming problem will not arise the optimal design of impellers and diffuses enables the best possible hydraulic efficiency PLANO & amp; CSS series must be filled with clear cold drinking water as detailed in our operators manual. Pressure equalizing rubber diaphragm is provided to guard the motor from pressure and volume variations of water as detailed in our operators manual. Three phase motor requires an adequate motor protection control panel of the CRI open well pump sets