Get current pricing for Aro, 666151-244-C. Aro 1.5 316 Stainless Steel Diaphragm Pump. Model 666151-244-c. Pump Has A 1.5 Npt Inlet And A 1.5 Npt Outlet. Pump Has Up To An Estimated 90 Gpm F . Product Category: Process Equipment, Sub Category: Process Pumps: