Hutterer & Lechner Air admittance valve, 1' [Code number: HL 902]

Air admittance valve HL 902 is designed for installation in unventilated sewer risers. It can help you prevent a possible disruption of water trap in sanitary devices, the device also does not allow polluted air penetrate into the room. It is made of polypropylene. Diameter of the air admittance valve is 1". It is designed for HL 404 model.