Mayfair Ultra Combo Manual & Automatic Cartridge Bilge Pump 500 GPH 3/4" Port 12v - Johnson Pump
The most reliable switch in the marine industry with the most robust cartridge pump around. Reliable switch activation, replaceable cartridge design, pre-wired for auto operation as well as manual override and with Dura Port discharge fittings in 3/4" for 500, 750 and 1000 GPH pumps. 1-1/8" O.D. discharge port for 1250 GPH.