Get current pricing for Warren-rupp/ Sandpiper, SB1-1/2-A Sandpiper 1.5 Aluminum Diaphragm Pump. Model Sb1-1/2-a. Pump Has A 1.5 Npt Inlet And A 1.5 Npt Outlet. Pump Has Up To An Estimated 90 Gpm Flow Rate . Product Category: Process Equipment, Sub Category: Process Pumps: