SeaLand T-Series Pump 12 VDC Runs dry without harm. Up to 280 GPH capacity! The SeaLand T-Series pump solves the most serious problem associated with impeller-type macerator pumps - it can run dry without damage. Its patented bellows pump has no impellers to burn up, and still handles tough marine waste while drawing just 6 amps at 12 VDC. With the T12 pumps from SeaLand, discharging your tanks is now easy and reliable.