Replacement cartridges can be used to repair your non-working cartridge bilge pump or to upgrade the output in a matter of minutes.In the event of a problem, replacing your cartridge bilge pump motor is easy provided you keep one of these on hand. Just pop out the old cartridge and popin the new. Fit Johnson, West Marine Bilge Pro and Mayfair cartridge-style bilge and livewell pumps.Key FeaturesOffered for 500, 750, 1000gph West Marine, Johnson and Mayfair cartridge pumps and livewell pumpsThree-year warranty