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Deccan (V4) borewell submersible pumpsets are of dual type construction with a motor and a pump. The motor and pump are coupled at site. The motor is water filled and made to Indian / NEMA standards. The pump is made of glass filled polymers. A non return valve fitted at discharge outlet prevents the back rush of water after stopping. The motor case shafts, fasteners are all made of stainless steel. No threaded joints are used.