Providing there is good air circulation, an air admittance valve can be installed in a roof space or an airing cupboard, but make sure you can easily access it for maintenance. The valve should be placed on a soil pipe that is at least 200mm above any water entry pipe or the highest point that wastewater will normally reach in the soil pipe.. Air Admittance Valves, also referred to in the industry as Durgo Valves, are basically a cleverly designed one-way valve that is fitted to the top of the soil pipe. When siphoning pressure builds up within the pipe system the valve opens to allow air in, balancing the pressure. Crucially though when the valve operates, it only opens one-way.
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How to Install an Air Admittance Valve to Fix a SlowDraining Sink
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How to Install an Air Admittance Valve to Keep Your Sink Draining Properly Better Homes & Gardens
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Install the PVC drain line, the sanitary tee, and the P-trap for the sink. The appropriate coupling for the AAV (glued or threaded) attaches to the tee. Check the manufacturer’s instructions and local codes to determine the proper height for the AAV above the drain. How to Draw a Plumbing Plan for Your Next Remodeling Project.. The FloPlast Air Admittance Valves are designed to allow the free entry of air into the sanitary pipework system without the escape of foul gasses into the building. When installed into sanitary pipework systems conforming to BS EN 12056:2000, the FloPlast Air Admittance Valve not only prevents the loss of water from trap seals due to induced.
