Air Admittance Valve

Air Admittance Valve
Introduction Features & Key Properties Technical Details Product Details


Astral 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. Astral Air Admittance Valves are manufactured with latest European standards and their working temperature range is from -20°c to +60°c.

Features & Key Properties

  • Eliminates the generation of negative pressure in the system
  • Prevents the spread of sewer gases and bad odours
  • Helps to improve the performance of a sewage system – facilitates sewage discharge.
  • Eliminates the possibility of water coming out of siphons.
  • Reduces investment costs – smaller number of lead-through points in the roofs, not all
    risers have to be ventilated with a venting device.
  • Helps to improve the flexibility of arrangement of sanitary fixtures – enables greater
    distance between the fixtures and the riser.
  • A single product which is suitable for installation on pipes of different sizes.
  • In the event of a fire, the valves reduce the risk of fire and smoke spreading via sewage
    pipes (through the elimination of the stack effect).

Product Range

  • Mini – 32 mm to 63 mm (designed for use in branched sections of the sewage system and in small risers)
  • Maxi – 75 mm to 110 mm (suitable for use in sewerage risers and branched sections with high flow rate)

Technical Details

Technical Data Diameter (mm)
32-63 75-110
Material ABS ABS
Color White White
Air Flow (ltr/sec) 6.1 23.2
Height (mm) 80 108
Working Temp. Range -20°c to +60°c
Applicable Standards EN 12380, EN ISO 3126

Product Details

  • Air Admittance Valve

Clamps & Hangers

Air Admittance Valve


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