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Old 11-21-2011, 11:50 AM   #1
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AAV kitchen island vent code


Adding a kitchen island and a vent isn't easily accessible. I tried to call my local building dept but they are closed this whole week on furlough.

Does anyone know if Air Admittance Valve vents are compliant with Hayward, CA building codes? Or where I can call and check to find out?

http://www.studor.com/mini-vent.htm
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Old 12-31-2011, 12:11 AM   #2
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AAV kitchen island vent code


Got the answer, mechanical venting is not allowed, so no.
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Old 12-31-2011, 12:21 AM   #3
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AAV kitchen island vent code


many years ago when i was in fla they would allow you to run a 3 inch line to an island sink and put a 3x1-1/2 tee on it for the drainand run the 3 inch up just under the countertop. since it was double the diameter of the minimum drain size it was self venting. I guess they approved it because 3 inch will carry 4 times what 1-1/2 will. some places would let you do a loop vent instead.
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Old 12-31-2011, 12:06 PM   #4
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AAV kitchen island vent code


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Originally Posted by DannyT View Post
many years ago when i was in fla they would allow you to run a 3 inch line to an island sink and put a 3x1-1/2 tee on it for the drainand run the 3 inch up just under the countertop. since it was double the diameter of the minimum drain size it was self venting. I guess they approved it because 3 inch will carry 4 times what 1-1/2 will. some places would let you do a loop vent instead.
Ive seen oversized drains used before,another option might be an island/loop vent going back down through the floor to an area it can be tied back into a vent stack
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Old 12-31-2011, 01:36 PM   #5
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AAV kitchen island vent code


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Originally Posted by DannyT View Post
many years ago when i was in fla they would allow you to run a 3 inch line to an island sink and put a 3x1-1/2 tee on it for the drainand run the 3 inch up just under the countertop. since it was double the diameter of the minimum drain size it was self venting. I guess they approved it because 3 inch will carry 4 times what 1-1/2 will. some places would let you do a loop vent instead.
Here in. Florida you can now run it in 2" with a AAV. i don't care for the set up but it works and it's ok under our code
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