The Reed EHTP500C electric hydrostatic test pumps are designed for pressure testing water systems such as water meters, plumbing lines, pressure vessels, solar systems and sprinkler systems, in both residential and commercial buildings. A standard 110 V outlet is required and the electric motor is UL certified. The output pressure is easily adjusted simply by turning a knob and watching the attached gauge. A built-in bypass allows for automatic water recirculation once the set pressure is reached. When the test pump is turned off, it can be easily disconnected from the test system and taken elsewhere or stored away.