Air Admittance Valve for Sewage System

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Air Admittance Valve

Air Admittance Valve

Negative Pressure Elimination Valve for Sewage

Astral’s Air Admittance Valves are designed to address the issue of negative air pressure that occurs in sewage systems when sanitary facilities are utilized. This negative pressure can lead to the siphons losing water due to the flow of sewage. By providing an air supply to the sewage system, air admittance valves effectively counterbalance negative air pressure. Astral Air Admittance Valves are manufactured in accordance with the latest European standards and are capable of operating within a temperature range of -20°C to +60°C.

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Features & Benefits

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 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.

Fields of Application

Use as negative pressure eliminator in SWR pipe

Standards & Specifications

EN 12380
EN ISO 3126

Available Sizes

Mini- 32 mm to 50mm
(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 rivers and branched sections with high flow rate)