Durco Centrifugal Pump. Flow rate for new pump is 50 gpm with required horsepower and pressure. Discuss with salesperson your process and product to determine if this refurbished pump should handle your specific duty. (1) 7 in. dia. impeller. Inlet: (1) 3 in. flanged port with (4) ½ in. dia. mounting hole, 4-1/4 in. adjacent, 6 in. opposite. Outlet: (1) 2 in. flanged port with (4) ¾ in. dia. mounting hole, 3-3/8 in. adjacent, 4-3/4 in. opposite. Overall dimensions: 2 ft. 2 in. L x 1 ft. 6 in. W x 1 ft. 7 in. H.