The 6 Best Boat Drain Check valves (2023 reviews)

The aincix boat drain check valve is long-lasting, rigid and fits well with your regular usage like a dream. These are nice little check valves. It fits perfectly inside 1 1/8" corrugated bilge drain line, no need for extra fittings. It is a check valve for a boat bilge pump so the water in the discharge hose between the pump and boat hull discharge port doesn’t come back to the bilge pump area causing the pump to turn on and off, killing the battery.

The 3/4 check valve is plastic, and the hose clamps are stainless steel. It keeps the kitchen sink drain from backing up into the dishwasher when it gets plugged. The design is for the hose instead of pipe. It is compatible with 350gph, 500gph and 750gph. These are made of plastic so they may need to be cleaned periodically.

Why We Like This:

Fits perfectly inside 1 1/8" flexible corrugated bilge exit tubing
Worked really well to connect the dishwasher output hose to the sink plumbing
Tight on large part of body so you can use 3/4" or 1 1/
Almost no resistance so no change in bilge pump output

Best For thru hull fitting: Attwood Boat Drain Check valve

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Next on the list, we've got yet another valve that manages to win our hearts. It's the attwood boat drain check valve and it's widely considered as one of the best convenient valve you can buy. The kit comes with a new plastic ring, rubber flap, rubber backing gasket ring, and four stainless screws. It works great at sealing and keeping water out. The rear one raises off the hull surface slightly to clear the thru hull fitting. It does not fully close, therefore while drifting or without propulsion the water comes in. It also comes with 4 screws. It is easy to install, and they fit flush. The inside of the scupper is 4" diameter. It is easy to install, and they now fit flush.

Why We Like This:

Perfect replacement for oem boston whaler scuppers
Is designed to be mounted over thru the hull fittings up to
New and hot release

Best For livewell: Flowrite Boat Drain Check valve

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Compared with other valve in this category, the flowrite boat drain check valve has a convenient design. The pump will recirculate and aerate the livewell water and simultaneously blend in a portion of fresh lake water. It works well for those times when outside water is not wanted or available, such as adding ice, livewell additives, etc., place the valve in the "recirc" position. It also has a third closed "recirc" position. It is used for automatic drain control and livewell management.

Why We Like This:

One of the new comers and featured product
Good brand reputation

Best For long Bilge: Whale Boat Drain Check valve

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The whale boat drain check valve's material feels more premium than its price would suggest. The newer bilge pumps use 1 1/8" fittings. The valve effectively prevents that water from draining back into the bilge. The variation in the size of the flange (going from small to large) is what accommodates the size of the hose. It maintains prime in a suction or discharge line. It can be used with manual or electric pumps.

Why We Like This:

Prevents drain back so a line is always ready for pumping
Essential if you have a long run of hose
Durable nitrile construction for reliable performance

Best With Switch: Seasense Boat Drain Check valve

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The seasense boat drain check valve's superior materials makes sure that it ages well with use. The Seasense brass shut-off valves are for 1/4" fuel lines provide a quick and easy way to connect one or more tanks to your motor. It allows only one position of the handle. It is working quite nicely and additionally works in mysterious ways. The valve is a plastic drum, so it will no take the pressure. It is a three way selector.

Why We Like This:

Three-port diverting valve to regulate flow among three sections of pipe
One of the new comers and featured product

Best For RV: Ambassador Marine Boat Drain Check valve

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We would, of course, be remiss if we didn't mention ambassador marine boat drain check valve for regular usage. This is a nice solid heavy unit, no complaints there, the finish on the SS is nice and only time will tell how it holds up (been on the boat a while) and no rust yet. It is used for water inlet on motorhome. It is made of bright polished solid 316 stainless steel. It fits and finish is great and a valve is easily attached on the back side for $.

It is more rugged and lasts many times longer. It is a well made inlet and standard fittings work to plumb it in.

Why We Like This: