The self-priming Par-Mate automatic water system pump is designed for self-contained recreational vehicles and pleasure boats with multiple fixture systems. The system is automatic when a faucet is opened, the pump instantly begins operation to provide a constant flow from tank to faucet. Closing the faucet automatically discontinues pump operation. Runs dry without damage. Draws 2.8 amps at open flow. 6 amp fuse required. Ports are 1/2” threaded for compression fittings and includes adapters for 1/2” ID hose. size 8 17/32” x 5 1/4” x 3 3/8” 12 VDC 2.5 GPM. Mfg/N 46010-2900.