The Attwood T500 Manual Pump Cartridge motor replacement is a replacement cartridge that can add more power to your boats bilge pump. The bilge pump cartridge has a special twist and lock design that makes it easy for you to replace the cartridge. It can be used for the T500, T800 and the T1200 Tsunami Bilge pumps and can also be used for the Aerator pumps. The Tsunami pump part is 12 volt and has a 36 inch wire. The pump has a good efficiency and it is easy to service it.