12 volt automatic pressure-controlled pump provides smooth pressurized water flow to boat & RV fresh water systems with multiple outlets. Aqua King II Prem. 4.0GPM Fresh Water Pump | Shurflo 4148-153-E75 Shurflo Aqua King II premium 4.0 fresh water pump Provides like-home shower pressure at full flow and can also operate at lower flow conditions with low cycling Built in mechanical bypass function enables the pump to vary the flow rate for any on-demand condition Created with a unique co-molded diaphragm and internal by-pass for long life and reliable performance 4 independent pump chambers Eliminates the need for an accumulator tank 4 GPM flow rate Self-priming up to 6 feet 55 PSI shut-off pressure Built-in check valve and thermal overload protection features Diaphragm design can run dry without damage to the pump Sealed switch Heavy duty motor features an electro-coating to resist corrosion Includes pump inlet strainer and (2) 1/2 in. hose barb fittings 1/2 in. MNPT ports 12 volt DC operation 10 amps max. Ignition protected 10 in. long x 5 in. wide x 4.75 in. tall Three year warranty