Get current pricing for Fristam, 3531-170 Fristam Fpx 3531-170 Stainless Steel Centrifugal Pump. Size 2.5 X 2 X 6.5. Pump Has A 2.5 Sanitary Inlet, 2 Sanitary Outlet And 6.5 Diameter Impell . Product Category: Process Equipment, Sub Category: Process Pumps: