It provides reliable performance in high water flow, moderate pressure applications. This 3-chamber diaphragm pump provides up to 11.3 liters per minute and is capable of self-priming up to 180 cm vertical and can run dry without damage. Serves 1/2” (13 mm) outlets. This automatic water system pump has a built-in pressure switch, which automatically starts and stops when the faucet is opened and closed. 210mm x 132mm x 124mm h.