Rule have totally re-engineered their Rule Mate Automatic Bilge Pumps range and now provide some of the most technically advanced and reliable automatic pumps on the market.The Rule Mate 500 bilge pump operatesusing an internal level sensor. Whenwater reaches 2″ (5cm), the pump will automatically activate, removing water from Bilge. When the water level reaches 3/8″ (0.9cm) the pump will turn off until the water level rises again. Bilges are not always clean and free from debris. If the levelsensor becomes fouled by debris or contaminated water,Rule Mates unique back up feature will prevent the pumpfrom entering a run-on condition, protecting the batterywhile maintaining automatic operation.FeaturesFully automated bilge pump with integral sensorBack up feature to prevent dry running if sensor is fouled, pump reverts to 2.5 minute cycle modeCompact pump for smaller vesselsTough plastic bodyBack flow prevention to reduce the amount of water left over in the bilgeAir Vents in the body to help prevent air locks in challenging installationsQuick release inlet strainer allows rapid cleaningLow amp draw conserves batteriesIgnition protected and built in thermal cut-offSpecificationsVoltage: 12voltAmps @ 13.6V: 2.4(amp)Amps @ 12v: 1.8(amp)Fuse Size:4(amp)Connections: For 19mm (3/4″) or 25mm (1″) bore hose on inlet and outlet.Output:Up to 31 litres/minute (7 gallons/minute)Discharge head: Max. recommended discharge head 2mWiring: 3 Wire System Requires On-Off-Auto Panel Switch to compete installDimensionsDimensions: 112mm high, 130mm long, 73mm wide