Exterior Air Admittance Valve

Air admittance valves can be used in installations such as a kitchen island sink or a bathroom sink in a basement or a room on the side of the house opposite the vent stack.

Exterior air admittance valve. Air admittance valves are used to provided venting for soil and ventilating stacks - most types are for installation within a building others are specifically designed for outside use. The DEKS Air Admittance valve has been skilfully designed and engineered and removes the need for extra ventilation. Featuring a unique one-way valve mechanism preventing sewage gases from escaping this valve is suitable for indoor and outdoor plumbing.

Air admittance valves AAVs for use in sanitary plumbing and drainage. They are usually mounted on one branch of a sanitary tee with the other branch going to the drain. Most air admittance valves are designed only for use inside so if youre planning on doing this you will need to buy one that is suitable for external use.

Unless an air admittance valves is specifically described as being for external use it should only be installed internally. 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. 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.

This means that if you are replacing an external soil stack you can fit an AX110 avoiding the need to take the soil pipe above the level of the eaves. Studor AAVs must be installed within 15 degrees of the vertical position. Open air admittance valve.

This is so the pressure equalisation can occur without breaking the water in the traps. Part H of building regs doesnt allow AAVs to be installed outside but it would be OK if it had a BBA certificate stating that it could be installed outside. The purpose of an air admittance valve or AAV is to provide a viable way to vent a fixture drain P-trap in the event that hooking up the drain to the buildings vent network is prohibitively costly or difficult.

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