New fresh water diaphragm pump from Shurflo, with redesigned 4 chamber head, fully adjustable sealed pressure switch and heavy duty sealed motor. Built in check-valve, self primes (up to 6 feet), will run dry without damage. Ignition and thermal protection. Flow rate: 7.6LPM, pressure: 20psi. New heavy duty design provides smoother flow due to 4 chamber head.