Heavy Duty Bilge Pump 1600 series 12v:. The best choice when you are looking for high performance, heavy duty pumps. designed to meet and exceed the tough demands of commercial and recreational duty. This pump has a liquid cooled, 12-pole motor with double ball bearings for extended service life. The 2200 motor is sealed off by a mechanical seal design, while the 1600 model has lipseal. The impeller is carefully designed and tested to maximize head and flow. The 4000 features a robust motor design, mechanical shaft seal, high impact ABS plastic and unique threaded port design. Universal base plate and a choice of 1-1/2" or 2" ports makes for a simple installation. Removable check valve included.. CE-Approved. Features:. Heavy duty, 12-pole double ball bearing motor. Liquid cooled for extended motor life. Quality engineered mechanical/lip seal. ISO 8849 Marine and CE standards. Easily interchangeable with most similar bilge pumps. Pump body: Thermoplastic. Shaft seal: Mechanical seal. S