5-Chamber diaphragm pump provides smooth, quiet and vibration free operation even at low speeds. Features both thermal overload and ignition protection. Operates in fresh and salt water. Self-priming to 6.5' (8.2' for 5.2gpm models) with an integrated pressure switch with 41psi cutoff, and can run dry without damage. Use an inlet strainer before pump intake. Accumulator tanks are recommended. Includes 1/2" hose / 3/8" NPT and 3/4" hose / 1/2" NPT connections. GPM 4.0 Volts 12 Amps 9