SERIES AV-150 ALUMINUM BODY AIR VENT uses a hard, precision ground, inert solid plastic float ball which prevents “sticking” in the closed position. The float ball seats against a precision o-ring providing a tight seal at very low pressures where other vents often leak. The aerodynamic “air-flow” design of a high-strength alloy aluminum body and full baffle assures maximum vent capacity without premature closing.
The 1.5″ and 2″ models are rated to 150 psi. The 3″ and 4″ models are rated to 100 psi.