Par-Mate Automatic Water System Pump provides smooth water flow and quiet dependability. Compact. Dual chamber design. Installs in confined areas. Reversable flow convenience as pump head rotates on motor. Meets USCG requirements for ignition protection. Ports are 1/2" threaded for compression fittings and plastic tubing. Includes adapters for 1/2" ID hose. 9-1/3" x 5/14" x 3 3/8". 2.5 gallons per minute. 12 volts DC. Pressure cut-in is 28 and cut-out is 40. 4 amp draw at 10 PSI. Fuse size is 6. Santoprene diaphragm and black thermoplastic exterior. Many sizes and varieties available.