The Double Disc Pump from Penn Valley Pump eliminates the friction wear associated with progressive cavity and rotary lobe pump styles. The pump can run dry without damage and incorporates a sealing trunnion that requires no maintenance, no seal water, no packing, and no lubrication and does not leak. The company offers a Swap Your Pump trial program that provides the opportunity to try the pump risk-free. 800-311-3311; www.pennvalleypump.com; Booth 929.