An onboard washdown system provides a convenient means to hose down the deck after a day of boating. Clean up your cockpit after landing a big fish, rinse off the muddy anchor rode as it’s raised by your windlass, or hose off seagull indiscretions and rinse the decks after a scrub down.

Washdown System Components

Washdown systems include a 12V DC pump with an integral pressure switch, a hose and nozzle, an inline filter, wiring, circuit protection and connectors.

Pump Water Pressure

Pump capacity is rated in gallons per minute (gpm). A diaphragm pump in the 3.4gpm to 5gpm range meets the needs of most small and medium-sized boats, generally providing pressures in the 35-50psi range, roughly equivalent to 35-50% of “city water” pressure.

Pump Installation Options

Install your pump in an out-of-the-way but accessible location. Locate the pump above the high-water mark of the bilge, although most of these pumps are designed for use in wet locations. Washdown pumps are often installed in a protected location under a boat’s gunwale or in a cockpit locker.

Catflo High flow 4.0GPM Wash Down Pump

If you are fed up with filling buckets of water for washing your anchor or fish scales off your deck and eliminate the mud - it’s high time to install the Catflo 4.0 washdown water pump on your vessel.

Our 4.0GPM Washdown Pump is great for general washdown of the deck and bait stations and includes the pump, a hose, spray nozzle and quick connect hose fittings.

To supply the pump with seawater, you’ll need to tee into an existing seawater line—or install a separate thru-hull and seacock. You will need 1/2" or 3/4" reinforced inlet hose, 1/2" or 3/4" outlet hose (minimum 100psi burst strength), hose clamps, and an in-line strainer between the seacock and the pump to keep debris out of the pump. An optional component is an accumulator tank, which installs downstream from the pump. Accumulator tanks smooth out water delivery and allow the pump to cycle on and off less frequently.