The SEAFLO 42 Series 3.0 GPM Variable-Flow Automatic-Demand Water Pressure Pump is a 4-chamber model capable of supplying up to 3.0 GPM. The 42 Series features Variable Flow Technology with an internal bypass feature that allows the pump to provide the amount of water you demand without cycling. No accumulator tank is necessary! The pump can be used in both fresh and saltwater applications, making it ideal for supplying water to up to 4 fixtures or using it as a raw water wash down pump. The completely rubber mounting base isolates pump vibration for very quiet operation.The 42 Series diaphragm pump is self-priming up to 6 vertical feet and can run dry without harm. The built-in adjustable pressure switch automatically starts and stops the pump when the faucet is opened or closed. The pressure switch is factory set to 55 PSI pressure cutoff, but this setting can be adjusted up or down by the user. It comes with two 1/2" barbed fittings and one strainer. 4-year warranty .FEATURES. Capable of supplying multiple fixtures. Internal bypass system reduces the need for an accumulator tank and prevents low-flow cycling. Can be used for salt and freshwater. Rubber feet to reduce vibration and noise for quiet operation. Self-Priming Capabilities: 6 vertical feet suction lift. Four-chamber positive displacement diaphragm pump. Built-in check valve. Ignition protected. Run-dry safe. Built-in thermal protection. Two 1/2" barbed fittings and one strainer included. SPECS: Model: SFDP1-030-055-42. Voltage: 12V. Open Flow: 3.0 GPM. Control Type: Adjustable pressure switch factory set at 55 PSI. Max Draw: 7.5A. Valves: EPDM. Diaphragm: Santoprene. Housing Material: Nylon/Polypropylene. Inlet/Outlet Ports: 1/2"-14 MNPT. Leads: 16 AWG, 9.4" long with 2-pin connector. Weight: 4.0 lbs. Overall Dimensions: 7.97"L x 4.92"W x 4.37"H.