The 34-Series is our continuous-duty on-demand positive displacement pump. It provides reliable performance in moderate water flow, high-pressure applications. This 3-chamber diaphragm pump provides up to 2.2 gallons per minute and is capable of self-priming up to 6 vertical feet, and can run dry without damage. Serves 2 or more 1/2” (13 mm) outlets. This automatic demand water system pump has a built-in pressure switch, which automatically starts and stops when the fixture is opened and closed. They are easy to install service and winterize.