The 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.
Product is A1 approved in accordance with BS EN 12380, it can be installed below the flood level of connected appliances
Tested and approved for use in installations varying between -20° & +60°C (no insulation required)
Airflow: 43 L/s
Air Admittance Valve may also be used as a secondary rodding point to remove such blockages