A fixed version of each opening porthole is also available

) 11 1/4 Overall height (In

All weatherproof Bulb NOT included

Length x Width  1-31/32" x 7/8" Std Pkg 30

8-10 WEEKS FROM PLACING YOUR ORDER

Vetus ASDV - Anti Syphon Device with valve, 13 - 32 mm Bernard A fixed version of eachType ASDV air vents are interchangeable with type AIRVENT and have the same fixing hole centers. The advantage is that the air bleed connection rotates through 360. In addition, the valve can be maintained without removing the vent from the wall and no tools are required to do this. For replacement, a set with 5 valves is available as a spare part.