The F42 Series 4 Chamber Water System Pressure Diaphragm Pump 55PSI AC 115V or 230V Booster pump is our general-duty on-demand positive displacement pump. It provides reliable performance in high water flow, moderate pressure applications. Designed by 4 stronger chambers, the water system pump could provides up flow from 3.0 to 5.5 GPM and is capable of self-priming up to 6 vertical feet, and can run dry without damage. Serves 3 or more 1/2” (13 mm) outlets.