Home SHOP Marine Fuel Systems Anti-Siphon Fittings

13 products

  • Free Shipping

    Free Ground Shipping - Most Orders over $99 shipped to continental United States. *Exclusions apply.

  • Installment Payments Available

    Pay In 4 - Interest Free Payments!

    See Details at Checkout.

  • Shop Confidently!

    Quality marine engine & drive parts

    since 2006

Let customers speak for us

from 87 reviews
Great Stuff

Great Stuff Use it Every Winter

Anonymous
STA-BIL Storage Fuel Stabilizer - 8 oz | Sta-bil 22208
Would have been 5 stars but....

Would have been 5 stars but, I did not receive a promotional sticker with my $2000 drive unit. Just kidding, everything was great!

William S.
Engine Oil Synthetic Blend XPS 5W-40 4T, Quart | Evinrude/Johnson 0779434

Fast track to Germany…

Oliver F.
Crusader Line,Fuel Filter/Tbi In 98344
Excellent product and Communication

Ordered aftermarket power pack for my 55hp Johnson. Received email and text offering OEM part at aftermarket price. Absolutely great! Thanks!!!

Greg M.
Power Pack Screw Terminal No RPM Limit 2 Cylinder | CDI 113-1397
Crusader parts

Great company to work with!

Tom B.
Gasket Exhaust Elbow 3 Hole | Crusader 96108

Ordered a Piranha Propellers Complete A-Series 4 Blade Propeller from Macomb Marine Parts and even though we’re international, it arrived in just over a week — fast and reliable service. The propeller itself is a real lifesaver. We had the same model before, and after hitting a rock that damaged two blades, we were able to swap them right on the water and make it back to the marina without issue — something you simply can’t do with a regular aluminum prop. For peace of mind we decided to buy a complete new set (hub and blades) since an impact like that could cause hidden damage, but the system really proved its worth.

Alexiel M.
Piranha Propellers Complete A-Series 4 Blade Propeller

3 in. Exhaust Elbow | Pleasurecraft R029001

Randolph D.
3 in. Exhaust Elbow | Pleasurecraft R029001

Excellent part.

Nelson R.
5" x 4" x 4" Air Divider Adapter Y | MSI Marine AY544
Piranha Propeller

I couldn’t find a Piranha propeller dealer near me in Canada but found Macomb Marine Parts who could deliver to me. The order process was smooth and I was even contacted via email for clarification regarding blade shape and they were very helpful in choosing the best shape for my purposes.
I can’t comment on the prop’s performance yet as we haven’t had the boat in the water yet.

S.S.
Piranha Propellers Propulsion Kit A-Series 4-Blade

Perfect replacement. thank you

MICHAEL W.
Strainer Transparent Cylinder 1/2 in. | Perko 049300499C

Perfect replacement

Michael K.
Chesapeake White Fuel Level Gauge | Faria 13801
Perfect match

Perfect match to the original Chris Craft blue. Competitive price and delivery was quick

jason b.
Spray Paint Color Vision Chrysler Blue | Moeller 025340
Great Product

Great Product, easy to install, work well

Kevin M.
Boat Buckle Rodbuckle Gunwale/Deck Mount Tie Down F14200
Magnesium anode for a 1994 OMC Cobra (SX-C) transom shield

Obtaining magnesium anodes to install on the OMC Cobra (SX-C) sterndrive, for fresh water use. Received the anode within a week of ordering the part, which is not going to be installed until Spring.

Paul B.
Volvo Penta Magnesium Transom Shield Anode | Martyr CM3854130M

Black Liquid Electrical Tape - 4 oz. | Star Brite 084104B

JEFFREY K.
Black Liquid Electrical Tape - 4 oz. | Star Brite 084104B

Anti Siphon Fittings

Essential Anti-Siphon Fittings for Marine Safety

Keeping your boat safe starts with a reliable fuel system. At Macomb Marine Parts, we offer high-quality anti-siphon fittings for your vessel. These small components play a massive role in fire prevention. They prevent fuel from draining into the bilge if a line breaks. Consequently, they are a vital safety feature for every gasoline-powered boat.

Why You Need Reliable Anti-Siphon Valves

Marine environments are tough on hardware. Vibrations and corrosion can cause fuel lines to leak over time. Without an anti-siphon valve, gravity could pull fuel out of your tank. This creates a dangerous puddle in your engine compartment. However, our fittings use a spring-loaded check ball to stop this flow. The valve only opens when the fuel pump creates suction. Therefore, your fuel stays in the tank where it belongs.

Premium Materials for Long-Lasting Performance

We carry fittings made from top-tier materials like aluminum and brass. Our aluminum valves are lightweight and highly resistant to the elements. Similarly, our brass fittings offer incredible durability for heavy-duty use. We stock trusted brands like EVM and Moeller Marine Products. These brands meet strict United States Coast Guard (USCG) safety standards. Because we prioritize quality, you can boat with total peace of mind.

Find the Perfect Fit for Your Fuel System

Compatibility is key when replacing fuel components. We offer a wide range of sizes, including 1/4" MNPT and 3/8" barb options. Many of our valves replace common parts from OMC and other major manufacturers. Furthermore, we provide both straight and 90-degree elbow configurations. This variety ensures you find the exact match for your specific engine layout. If you have questions, our expert team is always ready to help.

Easy Installation and Maintenance

Installing these fittings is a straightforward process for most boaters. Simply thread the valve into the fuel tank pickup tube. Then, connect your fuel hose to the barbed end. Regularly checking these fittings is also a smart habit. If you notice a drop in engine performance, the valve might be clogged. Fortunately, replacing a worn valve is an affordable way to maintain safety.

Shop Macomb Marine Parts Today

We take pride in being your go-to source for marine engine parts. Beyond fittings, we offer everything from fuel filters to carburetor kits. Most orders over $99 qualify for free ground shipping within the continental United States. Additionally, we offer flexible payment plans to make your repairs easier. Browse our collection of anti-siphon fittings today and protect your investment on the water. Stay safe and enjoy the waves with the right gear from MacombMarineParts.com