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The Colusa pump delivers highly efficient hydraulic performance. It has been designed to be silent, long-lasting and reliable.The pumps are self-priming from 1/2 hp to 3 hp and are supplied with 3,000 rpm single-phase and three-phase motors. Silent, the new hydraulic design has an extremely low noise level. A prefilter is mounted on the body of the pump to prevent foreign bodies from entering it that may damage its hydraulic parts. This prefilter has a wing nut and a transparent cover that makes maintenance work easier.Flow rates in l/h at 8 mwc for 1/ 2 hp, 10 mwc for 1 and 1.5 hp, 12 mwc for 2 hp and 14 mwc for 3 hp.