Said It Here

No room to fit a plumbing vent in tight spaces

When framing or walls leave zero clearance for a standard plumbing line, you are forced into awkward workarounds like bending pipes, cutting into door frames, or building complex offsets with cleanouts. These restrictions make it nearly impossible to install the vent properly without tearing into surrounding structures.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    Running the drain further back and adding a cleanout
  2. 2
    Using a wye with a street low heel sanitary tee or combination fitting
  3. 3
    Wet venting a toilet through the lavatory sink
  4. 4
    bending the filter to fit
  5. 5
    cutting a notch in the door frame

In their words

Unedited, most upvoted first, each linked to the thread it came from.

Has to be bent a little because whoever put the unit there/whoever put that wall there is an idiotsource ↗

lukesmith81 · r/hvacadvice · 2 upvotes

Cut a notch in the door frame is my only guess. That’s a tuff one.source ↗

Yanosh457 · r/hvacadvice · 2 upvotes

The problem is there isnt enough space to put my vent in.source ↗

shag-i · r/Plumbing · 1 upvotes

Thats the problem, I cant fit one in. I think my only option is to offsett it and put a cleanout insource ↗

shag-i · r/Plumbing · 1 upvotes

Where this came up

People with this problem also raised