Vanity vent question

[GatorKenD]

I'm probably answering my own question, but thought I'd put this out there before making extra work for myself. Doing a bathroom remodel. All the plumbing is exposed. I have a horizontal vent branch for the vanity that is 39.5" above the floor. The old vanity was 36" high. As I understand it, that branch should have been 6" above the flood rim of the sinks. It wasn't. The new sinks I'm installing will have a flood rim 3" higher than the old ones (they will be at 39").

I need to raise that horizontal branch, don't I?

 

[hj]

That is why the codes read, "6 inches above the overflow level of the fixture OR 42" above the floor, whichever is HIGHEST", so people do NOT have a problem when they remodel a room. The answer to your question is YES.