Heavy Duty Bilge Pump 4000 GPH - 24VDesigned to meet and exceed the tough demands of commercial and recreational duty. This pump has a liquid cooled, 12-pole meter with double ball bearings for extended service life. The 2200 motor is sealed off by a mechanical seal design. The impeller is carefully designed and tested to maximize head and flow. Universal base plate and a choice of 1, 1/2" or 2" ports makes for a simple installation. Removable check valve included. Features:. Liquid cooled 12-pole motor. Runs on 12 Volt. Installation is easy