Swivel 90° Tank Vent Valve - 5/16" Hose, for Aluminum Tanks

Tank Vent Valves install in the top surface of the fuel tank are designed to control vapors generated during the diurnal cycle (daytime/nighttime expansion and contraction of fuel).
In older (non-vented fuel fill) installations, they may also direct excess tank vapors generated during the fueling process.

Vent lines from TVVs generally run to carbon canisters where any emitted fuel vapors are absorbed.
Properly installed, TVVs also help protect the carbon canisters from contact with liquid fuel.

Perko TVVs are sometimes referred to as "rollover valves" (since they offer rollover protection), and as "road grade vent valves".
They also include an overpressure relief feature.
These valves mount in the surface of the fuel tank.
Mounting options for tank mounted TVVs include flanged (for plastic tanks), threaded (for metal tanks) and swivel (for metal tanks).

• Swivel valves include valve, valve housing, O-ring, snap ring and tank receiver
• Internally mounted versions are available for both plastic and metal tanks on a custom basis; please call 800-426-6930 for details
• TVVs comply with the new CARB and EPA standards and meet the requirements of U.S.C.G. Safety Standards

These Swivel valves mount into a tank receiver (included) which is welded to the aluminum tank.


Heavy on the technical side...
Vent orifice: 0.091"
Airflow Rate Positive Pressure @ 0°F: 3.5 kPa > 10 l/min and 10 kPa > 18.2 l/min
Airflow Rate Positive Pressure @ 180°F: 7 kPa < 0.2 l/min and 13 kPa > 1 l/min
Re-opening pressure > min. 7 kPa
Maximum fuel leakage: < 1.5 cc/min @ 6 kPa pressure