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.

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. Then gravity closes the valve keeping sewer gases out of the room. We stock a ride range of air admittance valves products reece products to suit every home or job. These valves are gravity operated devices that respond to the negative pressure of draining water and open to let air in.

The purpose of an air admittance valve is the purpose of an air admittance valve is to provide a method of allowing air to enter the plumbing drainage system without the use of a vent extended to open air and to prevent sewer gases from escaping into a building. 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. 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. Air admittance valves aav are one way vents installed after the trap on the drain line of a fixture.

Air admittance valve. 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 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. An air admittance valve is a 1 way valve designed to allow air to enter the plumbing drainage system when negative pressures develop.

Extra info on the air admittance valve. Those installed internally are generally fitted within rooms or the roof space. 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. 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.

Shop air admittance valves products reece products at a reece store near you. 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. The air admittance valve shall be located within the maximum developed length permitted for. Depending on the valve and the size of the vent aavs can support one or multiple vent lines.

This one way valve is designed to allow air into the plumbing when negative pressure is developed from draining. 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. One solution is an air admittance valve or aav.