HypAirBalance Internal Push Fit Air Admittance Valve 70-110mm White 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.

Read more product details …