Attwood Anti-Siphon Tank Vent Review

Professional Overview of Attwood Anti-Siphon Tank Vent

The Attwood Anti-Siphon Tank Vent is a top-quality fuel vent outfitting a unique baffle system. It effectively prevents the infiltration of sea and washdown water while ensuring an undisrupted airflow. Particularly suited to vents instantiated in coamings or limited space locations, this unit firmly secures up to 9/16 inches thick hulls with a 90° fitting, which enables a more straight-forward hose routing approach to the tank.

Exclusive Features

  • Effective in obstructing water entry into the fuel system.
  • Provides fuel system ventilation.
  • Comprises a removable cover to facilitate inspections and debris eradication.
  • Enables pressure test procedures with the removable cover.
  • Alleviates the need for an installation of an anti-siphon loop in the vent hose.
  • Not compliant with the EPA-certified system requisites.
  • Guaranteed with a two-year warranty.

Technical Specs

The hose size is 5/8 inches, and the unit can fit into a maximum hull thickness of 9/16 inches. The vent is approved according to ABYC H-24 directives.

It must be noted that an extra 1 1/2 inches above the vent is required during the installation process to fit the anti-siphon valve. For an effective solution to keep undesired water out of your fuel system, consider the Attwood P-Trap Vents.


Instructions for both installation and use of the Attwood Anti-Siphon Tank Vent will be provided upon purchase.

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