air admittance valves
Product Details
(6)When the downstream drainage pipeline is blocked, the upstream air is enclosed in pipe to prevent drainage of upstream.
(5)It keeps silent in operation and has service life as that of drainage pipeline. It has good flame-proof performances and in advance alarming of blocking of pipeline.
(4)It substitutes single-row drainage system for dual-row gas-discharge and drainage system and roof venting caps, reducing cost of roof drainage works and protects roof from leakage.
(3)It is suitable for multi-story and high-rising buildings due to large gas suction capacity and equivalent drainage capacity.
(2)It works under gravity difference and merely allows gas-suction without discharge so as to keep odor within pipeline. It fast replenishes negative pressure withing pipeline to protect the water seal of other drainage utensils from damage.
(1)The fine weather-proof surface sealing ring keeps tight and rubber flap has an opening/closing sensitivity=14mm water column.
Features:
We supply DN50,DN75,DN110 and DN160 air admittance valves and customize other specifications as per samples.
