Remedy for AAV concealed in wall?

aavguy · Sep 22, 2010

Apparently I have an AAV in my bathroom wall that works for both my sink and toilet. It is 4 to 5 feet above the floor. I haven't had any problem with it, but am worried about it possibility of it failing and leaking sewer gas into the wall. What is the best solution for this? I was thinking about putting a small vent in the wall for accessibility and to help vent in case the AAV did leak sewer gas. Is this a good option?
Thanks

JohnjH2o1 · Sep 22, 2010

Code is AAV's must be accessible. I guess there was no inspection on the original job. Either extend the AAV to the attic or run the vent through the roof.

John

Sponsor · 2022-01-29T12:20:58-0800

hj · Sep 22, 2010

Make an access to it and replace it before it goes bad.

Ian Gills · Sep 22, 2010

Access panel time.

God bless access panels.

aavguy · Sep 22, 2010

I see Oatey makes a 4" x 6" access panel with optional vents... this might be the ticket. Heck, i might be able to hide the access panel behind my towel bar... looks like the right height.

aavguy · Sep 28, 2010

Quick question.. is just an access panel needed, or do I need a wall box around the AAV too?

Terry · Sep 28, 2010

A vented panel is all that's needed.

Oatey 39017 SURE-VENT AIR ADM VALVE, 1-1/2-Inch by 2-Inch, White

aavguy · Sep 28, 2010

Thanks for the quick reply! Wasn't sure, because I kept wondering if sewer gas would leak straight up into the wall, or towards the easiest exit (the panel vent).

Terry · Sep 28, 2010

The AAV is designed to let air suck in.
When you hold your finger over a straw, it doesn't drain.

The AAV is supposed to prevent air from escaping, but allows air to suck in and allow draining.
It needs to be installed in conjunction with a "real" vent somewhere in the system to account for positive and negative pressures.
The AAV is only good for the negative pressures.

Remedy for AAV concealed in wall?

Users who are viewing this thread

aavguy

New Member

JohnjH2o1

Plumbing Contractor for 49 years

Sponsor

Paid Advertisement

hj

Master Plumber

Ian Gills

Senior Robin Hood Guy

aavguy

New Member

aavguy

New Member

Terry

The Plumbing Wizard

aavguy

New Member

Terry

The Plumbing Wizard

Similar threads