Netafim 3/4in Guardian Air/Vacuum Relief Air Vent GrowersHouse Integra sizes it at roughly

Integra sizes it at roughly 5 g per cubic foot of enclosed space

Weight: 325 lbs

Get double the grow room assistance with this waterproof alternative to metalized film

Using this item in an unrecommended can void the warranty

Netafim 3/4in Guardian Air/Vacuum Relief Air Vent GrowersHouse Integra sizes it at roughlyGuardian Air Vents from Netafim provide maximum protection with proper placement in your irrigation system. The large capacity vents provide outstanding performance in venting air at start up and preventing vacuum issues at shutdown. Guardian Air Vents are used downstream of valves, at the manifolds to break vacuum at system shutdown and on any sloping terrain to prevent vacuum issues when pipes drain. Also used upstream of valves to release air at