Showing how a soil sub-stack in a typical cloakroom installation is completed by this essential venting valve. For more information about OSMA Soil & vent, c.. 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.
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installing air admittance valves on gravity fed soil and branch pipes which discharge to a sewer. Ventilation options Across the UK, Building Regulations and statutory guidance allow for ventilation by either open soil pipes or air admittance valves (Figure 1). The preferred solution, being the simplest and most. 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.
