Stainless steel submersible pumps for 4'' 6'' 8'' , sized for connection to the motor according to nema standards Discharge head with bulit-in non-return valve All standard pumps are completely manufacturered out of stainless steel 304. Application for water supply /irrigation / civil /industrial municipal pressure boosting. Ranges: 4sp1, 4sp2, 4sp3, 4sp5, 4sp8, 4sp14, 6sp17, 6sp30, 6sp46, 6sp60, 8sp77, 8sp95. Flow rate up to 120 m3/hr, head up to 410 meters. Customized impellers, diffusers, strainers, straps etc.Are available and welcome always.