White HypAirBalance Internal Air Admittance Valve Fits 70mm To 110mm Pipe Part No: 9-2730-070-10-03-01

• Air admittance valves respond to the negative air pressure created in a sewage system when sanitary facilities are used.
• Sewage flow can produce negative pressure and then water is drawn out of the siphons.
• Air admittance valves help to provide air supply to the sewage system and thus compensate for negative air pressure.

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