Attwood Marine Self-Priming Washdown Pump, 4 GPM, 12V, 8.5 PSI

Overview

The Attwood Marine 11574-4 is a self-priming washdown pump for 12-volt DC boats that need a simple way to rinse decks, clean gear, or feed a basic shower setup. It moves up to 4 gallons per minute and develops up to 8.5 psi, which gives it enough output for routine washdown work without adding a more complex pressure-water system.

This pump uses threaded male inlet and outlet connections for standard garden hose attachment, so it is straightforward to tie into common hose runs and quick cleanup jobs around the boat. The housing and impeller are made from corrosion-resistant ABS, which makes sense for wet areas where salt residue, spray, and regular rinse cycles are part of normal use.

It is a practical fit for small to mid-size boats running on 12V power where the goal is deck wash, cockpit cleanup, anchor locker rinse-down, or general freshwater transfer for light-duty onboard use. It should not be run dry.

Key features

• Self-priming 12V DC washdown pump for deck cleaning, general wash use, or basic shower-pump duty
• Flow rate up to 4 GPM with pressure up to 8.5 psi for regular rinse-down tasks on board
• Threaded male inlet and outlet accept standard garden hose connections
• Corrosion-resistant ABS housing and impeller for wet marine environments
• Heavy-duty 8-amp motor sized for 12-volt electrical systems
• Useful where a boat needs simple washdown capability without a full freshwater pressure setup

Installation and setup

This pump makes the most sense on boats with a 12V electrical system and hose runs that already use standard garden hose fittings. That keeps installation simple for owners replacing an older light-duty washdown pump or adding a dedicated rinse pump for deck and gear cleanup.

Because the pump is self-priming, it is easier to position in typical marine service spaces where the water source and discharge point are not on the same level. The output is well suited to rinse salt, sand, mud, fish residue, and dock grime from decks, cockpits, and hardware after a day on the water.

Compatibility and fit

This model is a good match for boaters who want a straightforward washdown pump rather than a high-capacity pressure-water system. It also works where one pump may handle more than one light-duty task, such as cockpit washdown and a simple shower application, as long as the boat uses 12V DC power and standard hose-style plumbing at the pump connections.

For saltwater boats that get frequent rinse-downs, the ABS housing and impeller help the pump stand up to repeated exposure to spray and moisture. Owners looking for a compact cleanup pump with uncomplicated hose connection and moderate output will find this model easier to place in everyday service around the boat.

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