Air Admittance Valve In Attic

Complies to asse standard 1050 and 1051 and iapmo listed sizes.

Air admittance valve in attic. 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. When there is a charge of water waste the air admittance valve will open and release the vacuum. Superior engineering along with stringent quality standards ensure unmatched performance. Oatey offers a wide range of sure vent air admittance valves to enable installation in virtually any application.

The air admittance valve shall be installed a minimum of 6 inches 152 mm above insulation materials installed in attics. Automatic air vents are no longer approved and should be replaced. Studer vent plumbing forum the inspector s journal. Air admittance valves aka studor vents are negative pressure activated one way mechanical valves.

An air admittance valve is a valve that is completely pressure activated. Aavs must be accessible. February 10 2017 by zamira leave a comment. 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. Air admittance valves aav are one way vents installed after the trap on the drain line of a fixture. 3114 5 access and ventilation access shall be provided to all air admittance valves. This advanced air admittance valve aav protects the trap seals in the drainage system by allowing the intake of air so a soil pipe can maintain the right level of pressure within the drainage system.

Aavs in attics should be at least six inches above the attic insulation. They re designed to address negative air pressure in the drain system created when a fixture is drained. 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. The air admittance valve shall be installed a minimum of 6 inches 152 mm above insulation materials where installed in attics.

The drain waste vent system dwv employs a mechanical vent also known as an air admittance valve or aav. Oatey sure vent aavs are available in four sizes ranging from 8 stack 24 branch dfu to 160 stack 500 branch dfu. 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. Air admittance valve in attic.

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.