Air Admittance Valve Types

They re designed to address negative air pressure in the drain system created when a fixture is drained.

Air admittance valve types.

One solution is an air admittance valve or aav. The negative pressure activated one way vents to protect the trap seals in the drainage system by allowing the intake of air so that the right level of. Air admittance valve. An air admittance valve is a 1 way valve designed to allow air to enter the plumbing drainage system when negative pressures develop.

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. Those installed internally are generally fitted within rooms or the roof space. Stack type air admittance valves shall be located not less than 6 inches 152 mm above the flood level rim of the highest fixture being vented. Air admittance valves aav are one way vents installed after the trap on the drain line of a fixture.

Then gravity closes the valve keeping sewer gases out of the room. The air admittance valve shall be located within the maximum developed length permitted for. In this way it is used on individual vents branch vents and circuit vents in lieu of terminating vents to the exterior of the structure. Depending on the valve and the size of the vent aavs can support one or multiple vent lines.

These valves are gravity operated devices that respond to the negative pressure of draining water and open to let air in. Extra info on the air admittance valve. Shop online for air admittance valves products reece products or visit a branch to chat with one of our friendly staff about your air admittance valves products reece needs. Shop air admittance valves products reece products at a reece store near you.

Individual and branch air admittance valves shall be located not less than 4 inches 102 mm above the horizontal branch drain or fixture drain being vented. Stack type air admittance valves shall be located not less than 6 inches 152 mm above the flood level rim of the highest fixture being vented. This one way valve is designed to allow air into the plumbing when negative pressure is developed from draining. In the event that your walls do not leave enough space for any of the above vents then the local code may allow you to opt for an air admittance valve aav.

We stock a ride range of air admittance valves products reece products to suit every home or job. The air admittance valve aav is a device designed to allow air to enter the drainage system to balance the pressure and prevent siphonage of the water trap when negative pressure develops in the system. World leading air admittance valves studor aavs eliminate the need for passive pipe venting and costly roof penetrations with world leading performance by their unique and patented design.