View Full Version : Placement of AAV
RockyMtnHigh
Jan 5, 2009, 02:11 AM
Long story short our kitchen sink in our house needs an AAV as a result of a renovation. My question is to the exact location of the AAV downstream from the p-trap. Thank you in advance for any advice.
RMH
Option 1. Place it ontop of the "T"
AAV
L
l--------------------P-Trap
l
l
l
Or...
Option 2. Downstream of Ptrap but before elbow
AAV
L
------------l---------P-Trap
l
l
L
L
massplumber2008
Jan 5, 2009, 05:10 AM
Hi RMH:
The AAV should be located within a few feet of the p-trap. It can be piped on the horizontal at least 6-12" above the pipe (picture 1 on left), or it can be on top of the vertical pipe above the ptrap (picture 2 on right). The AAV must remain accessible in case it needs to be changed in the future.
Let me know if need more...
MARK
speedball1
Jan 5, 2009, 08:57 AM
Long story short our kitchen sink in our house needs an AAV as a result of a renovation. My question is to the exact location of the AAV downstream from the p-trap. Thankyou in advance for any advice.
RMH
Option 1. Place it ontop of the "T"
AAV
l
l--------------------P-Trap
l
l
l
or....
Option 2. Downstream of Ptrap but before elbow
AAV
l
------------l---------P-Trap
l
l
l
l
How's this grab you? (see image) Good luck, Tom
dclynch
Jan 5, 2009, 12:04 PM
Are AAVs allowed in Mass residential codes?
massplumber2008
Jan 5, 2009, 04:05 PM
Hi Dennis...
NO... AAVs are NOT allowed in Massachusetts residentially or commercially.
You can appeal to the local plumbing inspector for a variance, but I have only seen 1 approved in 26 years!
Let us know if need more here...
MARK