attwood 90° P-Trap Fuel Tank Vent — Composite, 5/8" I.D., Splash-Resistant (Black)

The Attwood 66419-3 composite 90° P-trap fuel tank vent is a splash-resistant vent that prevents water ingress while allowing safe air flow to and from a 5/8" I.D. fuel tank hose.

When servicing or replacing a boat's fuel vent, you need a compact, corrosion-resistant component that vents air effectively without letting seawater enter the tank. The Attwood 66419-3 is engineered for marine environments: its composite construction resists corrosion, it meets ABYC standards, and its 90° P-trap design removes the need for an anti-siphon loop in the vent hose in many installations.

How does this vent stop water from entering my fuel tank?

The 90° P-trap geometry forms a splash-resistant barrier that redirects waves and washdown away from the vent opening while still allowing air to pass. Its internal path reduces the chance of water reaching the tank in normal sea conditions and during routine washdowns.

• Composite body resists corrosion and swelling in wet environments.
• Right-angle P-trap redirects splash and spray away from the hose inlet.
• Splash-resistant design reduces water intrusion without extra piping.

Will this fit my existing hose and installation requirements?

The Attwood 66419-3 is sized for a 5/8" I.D. vent hose, making it compatible with common marine fuel vent lines. It connects inline to the tank vent hose and requires a hose clamp for secure installation.

• Designed for 5/8" inner-diameter vent hose connections.
• Simple push-fit connection; secure with a standard hose clamp.
• 90° orientation helps route vent hoses neatly under decks or against bulkheads.

Does this vent meet marine safety or industry standards?

Yes—the 66419-3 is manufactured to meet ABYC (American Boat and Yacht Council) requirements relevant to fuel venting components. Using an ABYC-compliant vent supports safer and more code-aligned installations aboard recreational vessels.

• Manufactured to ABYC standards for fuel system components.
• Composite material avoids galvanic issues common with metals in saltwater.
• Provides a reliable venting solution for routine fueling and operation.

How easy is it to replace or install this vent?

Replacement is straightforward: cut or detach the old vent hose, push the 66419-3 onto the 5/8" hose, and secure with a hose clamp. No special tools or complex fittings are required, and the right-angle body simplifies routing in tight spaces.

• Quick push-fit installation; use a hose clamp for final securement.
• Compact 90° shape allows installation in confined compartments.
• Works as a direct replacement for damaged vents on compatible hoses.

Who is this for? The Attwood 66419-3 composite 90° P-trap fuel tank vent is intended for boat owners, naval technicians, and marine maintenance professionals who need a compact, ABYC-compliant vent that reduces water intrusion and simplifies vent hose routing. It's especially useful for recreational boats where corrosion resistance, ease of replacement, and tidy hose runs matter. If your vessel uses 5/8" I.D. vent hose and you want a reliable, splash-resistant vent that eliminates the need for an anti-siphon loop in many setups, this Attwood vent is designed to fit that need.