New vanity, waste smell.

I have a manufactured home with ABS plumbing and it used an AV in place of a vent. I replymbed it basically exactly as it was before. The only difference is I used a shielded no-hub connector to transition to PVC. I now smell sewer gas and can't figure it out. I can stick my nose at top of sink bowl and smell near drain and smell nothing. I open vanity cabinet and then smell gets stronger. All connections are tight bur seems as if odor is coming from coupler. Need help ASAP. Will post pics of setup.

Most likely your AAV has failed, or the smell is coming up through the floor from below...meaning you could have a problem underneath the house.

Well did some process of elimination. Took trap apart, water full in trap. Took plumbing apart and plugged drain line, no smell. So I know there's nothing coming from under house. It's either the coupling or AAV.

MikeVila said:

It's either the coupling or AAV.

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So what are you asking then?

I was updating my process on my thread. ????