5-chamber diaphragm pump designed for continuous duty. Features dramatically lower noise & water pulsation compared to 3 or 4 chamber designs. Self-priming to 6.5' (8.2' for 5.2 GPM model). Includes an integrated pressure switch and can run dry without damage. Use the included inlet strainer before pump intake. 12 Volts. 3-Year warranty. GPM 4.0 Ports 3/8" & 1/2" NPT, 1/2" & 3/4" Hose, 1/2"-14 NPSM