T-Series Discharge and Macerator Pump Runs dry without harm – for Holding Tank System Unlike impeller macerator pumps, our unique bellows pump can run dry without damage. Draws only 6 amps at 12-volt DC. Self-priming up to ten feet (3.3 meters) of water. Handles up to 270 gallons (1022 litres) per hour. BELLOWS PUMP 38mm (1½”) 12 and 24 Volt For large private and small charter boats. Good soft solids handling capability. Performance in solids handling equals 38mm diaphragm pump with improved reliability. Longer action provided by Bellows induces greater fluid movement per stroke. Reduced valve movement equals reduced valve failure. Horizontal pumping, by duckbill inlet and outlet valves, for convenient and low profile installation.