Air Admittance Valve for RV

[JohnRa]

Hi, I think I've got a bad Air Admittance Valve under my kitchen sink. I went to Home Depot and bought a 1.5 - 2" AAV (the only one they had). The one in my KZ RV is much smaller.

Does anyone know what size it actually is, and where I could find a replacement for it?

[JohnRa]

I don't really have much room under the sink. the cheater valve actually hits the underside of the sink.

Plus we've still got the smell from the sink. Boo. I think I may have to tear the drain apart and see if we've got something in there.

[myredracer]

The threads on the AAV in our KZ are 1 1/2". If it really is smaller, just get an adapter.

FWIW, I bought a replacement AAV for the one that failed in our KZ in less than year at Lowes. Well, that one failed too in a year.

I would suggest getting a high quality Oatey AAV or equivalent. The quality one cost quite a bit more tho.

[JohnRa]

Chris, that's exactly what I needed. Appreciate your help!

[Chris_Bryant]

I've seen both the large type you are talking bout and smaller ones. Try to see if they have this one (if it will display for you).

[momentum_rv]

Be sure to remove the 2" adapter on the new one if you are talking about the thread size/diameter. The existing plumbing should have a 1-1/2" fitting.

The valve diameter shouldn't matter.

[JohnRa]

The one I bought from Home Depot has a much larger diameter than the one I'm trying to replace.

[westend]

JohnRa wrote:
Sorry, I meant the diameter of the valve.

The overall diameter doesn't effect the functionality. Are you having a fitment issue?

[JohnRa]

Sorry, I meant the diameter of the valve.

[Chris_Bryant]

If you are talking about the threads, they should be 1 1/2" MPT.

Last year my vendor had them for $2. This year, a new model, $20.