Wash Down Pumps & Systems
What Are Marine Wash Down Pumps & Systems?
After a long day on the water, fish blood, saltwater residue, mud from a freshly raised anchor, and seagull droppings don't wait patiently for you to get back to the dock. Wash down pumps and systems are the unsung workhorses of onboard plumbing, delivering pressurized water right where you need it to keep your vessel clean and protected. A boat wash down pump takes water from below the waterline and pumps it above deck, where it can be used to rinse off the deck, muddy anchors, or anything else onboard.
How Do Wash Down Systems Work?
The wash down pump is a relatively simple system — it draws water directly from under your boat through a seacock, pressurizes it, and discharges it wherever the person using the washdown chooses. Most systems run on 12V DC power and include a pump with an integral pressure switch, an inline strainer, hose, and trigger nozzle. Wash down systems typically include a 12V DC pump with an integral pressure switch, a hose and nozzle, an inline filter, wiring, circuit protection, and connectors.
Typically for wash down pumps, the higher the flow and the higher the pressure, the better — though too much pressure can damage paintwork and other surfaces, while too little pressure won't shift the dirt. For most recreational boats, a diaphragm pump in the 3.4 to 5 GPM range meets the needs of most small and medium-sized boats, generally providing pressures in the 35–50 PSI range.
Key Considerations When Shopping
- Ignition Protection: An important detail for a wash down pump is whether or not it is ignition protected — ignition-protected devices are designed to prevent any sparks from the motor from escaping, and since most wash down pumps are mounted in the bilge, they must be ignition protected to avoid igniting fuel vapors.
- Corrosion Resistance: The marine environment can be hard on electrical equipment, so your pump must be made of materials that do not easily corrode — most are constructed out of polypropylene with stainless hardware.
- Flow Rate (GPM): Gallons per minute measures the volume a pump delivers — higher GPM clears heavy debris faster, but requires suitable wiring and plumbing.
- Fresh vs. Raw Water: Raw water is unlimited and ideal for anchor mud and fish cleaning, while freshwater is gentler on finishes — many boaters plumb both via a selector or manifold.
- Accumulator Tanks: An optional accumulator tank installs downstream from the pump to smooth out water delivery and allow the pump to cycle on and off less frequently.
- Dedicated Marine Hoses: Dedicated washdown hoses are designed to coil into tight spaces, resist UV wear, and hold up to marine use.
Top Brands in Wash Down Pumps & Systems
Trac Outdoor is a well-regarded name in marine accessories, offering wash down pump solutions built for the demands of both saltwater and freshwater boating environments. Their products are designed with the weekend angler and serious mariner alike in mind.
Groco is one of the most storied names in marine hardware. The Maryland-based Groco has been making marine hardware since 1918. If you want reliability and need a high flow rate, Groco pumps are well regarded for getting the job done. Their pump housings and motor casings feature all-metal construction with bronze plumbing throughout.
Seachoice is a trusted marine brand known for delivering broad coverage of essential boating accessories at accessible price points, making their wash down solutions a practical choice for boaters looking to outfit their vessel without compromise.