For boats with 3 to 4 fixtures. Runs dry. Belt drive and flexible mounts for low noise. Built-in check valve protects against city water pressure. Auto switch maintains 39 psi. Pulsation dampeners absorb water hammer. Conserves battery due to low amp motor. Ports for 1/2" to 5/8" ID hose. Reliable, smooth and steady flow. Salt water system compatible for galley rinse water and deck and anchor wash-down. 12 volts DC. Amps and fuse size are 6//8. Dimensions: 8-5/16" L x 8-5/16" W x 8-1/4" H.