UDOR U.S.A. run dry water pumps are manufactured with brass manifolds, heat-treated crankshafts, stainless steel check valves, industrial-quality bearings, solid ceramic plungers, and heavy-duty high-pressure seals. The ceramic plungers and improved machining technology allows them to tolerate changes in temperature — even those caused by running the pump dry. 651-785-0666; www.udorusa.com