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MINI-VENT Air Admittance Valve by Studor 1 1/2"-2" - PVC Adapter

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$40.59

Pressure sensitive valve: as fixture drains, negative pressure in the drainage system opens one-way valve, drawing air through the valve to cut off the water flow and prevent trap siphoning.
Admits air into drain, waste and vent systems.
Closes to prevent foul air or gasses inside.
Can be used as individual, branch, circuit or stack vent.
Reduces the number of fire-stopping applications since vent piping through walls and ceilings will not be needed.
Exclusive vermin protection system.
Limited outdoor use if protected from the elements.
Multiple roof vent penetration is reduced; only one vent needs to extend to the open atmosphere for each building drainage system.
For 1-1/2" or 2" IPS pipe.
Available with or without protective cover.
Can vent up to 24 drainage fixture units (DFU) on a 2" vertical stack.
View detailed dimensions & specifications.
Mini-vents must be installed vertically - they require gravity to close when the atmosphere inside the pipe stabilizes after a drain discharge.
NSF Standard 14, ASSE 1051, 1050 rated, IAMPO Classified Marking.
Always check with local code officials for any possible restrictions.