Tsunami aerator pumps are dependable and long-lasting. Cartridges are replaceable and interchangeable. Housing made of rugged, glass and mineral filled polymer that withstands hull pounding and resists chemicals. Easy installation: No mounting bracket required. 29" wire connector and threaded outlet style. 3 year warranty. 12VDC. Model T500 for 3/4" seacock GPH 500 Outlet 3/4"