Air Admittance Valve In Attic

Air admittance valves aka studor vents are negative pressure activated one way mechanical valves.

Air admittance valve in attic.

The air admittance valve shall be installed a minimum of 6 inches 152 mm above insulation materials installed in attics. Some authorities recommend air admittance valves on kitchen island fixtures to reduce the risk of horizontal vent lines becoming obstructed. The air admittance valve shall be located within the maximum developed length permitted for the vent. Pive house nerd venting about air photos of attic bypes with explanations venting with air admittance valves soil vent pipes durgo and air soil vent pipes durgo and air.

Superior engineering along with stringent quality standards ensure unmatched performance. Complies to asse standard 1050 and 1051 and iapmo listed sizes. The wastewater being sent down the drain referred to as a slug pushes air in the pipe in front of it leaving behind an area of negative pressure. It is for one way mechanical vents that are used in a plumbing system and it totally eliminates the need for a conventional roof and pipe venting penetration.

Oatey offers a wide range of sure vent air admittance valves to enable installation in virtually any application. Air admittance valve in attic. The air admittance valve shall be located within the maximum developed length permitted for the vent. Aavs in attics should be at least six inches above the attic insulation.

Aavs must be accessible. Air admittance valves aav are one way vents installed after the trap on the drain line of a fixture. Oatey sure vent aavs are available in four sizes ranging from 8 stack 24 branch dfu to 160 stack 500 branch dfu. Automatic air vents are no longer approved and should be replaced.

The air admittance valve shall be installed a minimum of 6 inches 152 mm above insulation materials where installed in attics. Used most commonly at an island sink or vanity the vents are also located in the attic to prevent the roof penetrations as seen above on the front roof line elevation. February 10 2017 by zamira leave a comment. An air admittance valve is a valve that is completely pressure activated.

Studer vent plumbing forum the inspector s journal. This application may have been approved by this local jurisdiction however you should be aware that this type of system is not recognized by california building officials as an approved vent system. The maxi vent is used in the following types of drainage venting applications and is the universal solution for venting the soil stack in any building. When there is a charge of water waste the air admittance valve will open and release the vacuum.

The drain waste vent system dwv employs a mechanical vent also known as an air admittance valve or aav.