Putting an offset in plumbing vent

Fabrik8

Overcomplicator
Joined
May 27, 2015
Location
Huntersville
I'm probably overthinking this, but is there anything that prevents me from adding an offset at two places in a vent line?
I need to put a register boot in the stud bay where the vent is, and I don't want to get an expensive custom register boot made if I can (very cheaply) offset the vent to get it out of the way.

I know there are rules about vent sizing and offsets, but I think that's only for drain/vent combo with devices above the offset that would have liquid flow.

Because this is a dry vent, I'm not sure if there is anything in code that would prevent me from doing this. But, I don't know a lot about plumbing so I'm fishing around here. I haven't been able to find anything that could clarify. The lower bends are 45 deg, the upper bends are 22 deg because I've got the space to make them more vertical.

Pic on the left is the existing vent, pic on the right is the re-routed vent.

Existing.PNG


The folded-over drywall is the cathedral ceiling from the lower floor bathroom. It's getting the register boot in the sidewall to be the intake for the vent fan. No, don't tell me to put the fan in the ceiling, it's not a good idea. It's going in the sidewall.

Yay CAD mockups!
 
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Just make sure the vent tee is installed in the correct direction. :flipoff2:
 
Just make sure the vent tee is installed in the correct direction. :flipoff2:

I sketched the sweep path in the right direction in SolidWorks when I drew the pipe, that's the important part. :p

This is totally going to be one of those "I don't get it, everything fit together in CAD" moments. :D
 
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