Rule submersible pumps are the first choice for many boat manufacturers. The Rule 3700 range are large capacity, extra heavy duty pumps which are tried and tested over time and proven to be the reliable solution for larger sailboats, motor cruiser and workboats Add a Rule Float Switch and Rule Panel to make it an automatic. See related products Features  High capacity pump for larger yachts motor cruisers and work vessels Tough plastic body. Quick release inlet strainer allows rapid cleaning. Motor rated for 2500-hour life. Ignition protected. For automatic operation use Rule Float Switches. Specification Voltage : 12 volt Connections: For 38mm (1.5") bore hose. Dimensions: 180mm high, 135mm base diameter. Fuse Size: 20(amp) Output: Up to 220 litres/minute (48 US gallons/minute). Disharge Head:Max. recommended discharge head 4m.