Smooth, quiet 3-chamber diaphragm Par-Max 2.9 pump is self-priming up to 10' and can run dry without damage. Built-in bypass gives less pulsation and reduces the need for an accumulator tank. Par-Max 2.9 can handle up to 3 fixtures. Corrosion-resistant materials. CSA listed. Meets ISO 8846 marine ignition protection. Pumps 2.9 gpm. 4.4 amps. 1/2" hose barbs.