this post was submitted on 06 Jan 2025
31 points (94.3% liked)

Home Improvement

9199 readers
83 users here now

Home Improvement

founded 2 years ago
MODERATORS
 
all 16 comments
sorted by: hot top controversial new old
[–] [email protected] 11 points 1 week ago (1 children)

Ignoring scale and any local requirements, yes, that's a valid trap and vent.

Be aware that local inspectors can be touchy about t-junctions. You might need a rounded or angled junction here so the new drain doesn't splash directly against the opposite side of the vent.

[–] ccunning 6 points 1 week ago (2 children)

Cool - thank you…

Do you happen to know why so many diagrams seem to have loops? (like this):

[–] [email protected] 8 points 1 week ago

Without that extra loop, it's possible that flushing the toilet will suck the water out of your sink trap.

[–] [email protected] 4 points 1 week ago

I know absolutely nothing about professional plumbing, but wouldn't that sink loop need to be there to act as a drain and vent for the sink? I don't think the main vent stack would work for that without it

[–] ccunning 7 points 1 week ago (1 children)

Is this a valid vent layout? Sorry for such a basic question but plumbing always seems to have some "gotcha" I didn't consider

[–] [email protected] 5 points 1 week ago (1 children)

Maybe it's because I'm not a plumber, but that diagram doesn't include any information about your plans.

[–] ccunning 3 points 1 week ago (1 children)

I’m not a plumber either so I could be completely wrong, but I believe it’s a minimum viable vent diagram.

What do you think is missing?

I basically have a drain with no vent or p-trap or anything and I’m hoping this would be a viable fix (you could imagine the right “column” as a straight line and that would be the current configuration)

[–] AA5B 5 points 1 week ago (1 children)

I can confidently say: maybe or maybe not. I really think you have too much context in your head and not here

[–] ccunning 7 points 1 week ago (1 children)

you have too much context in your head and not here

That's definitely something I'm guilty of from time to time.

Does this help?

* Drawing not to scale

[–] AA5B 8 points 1 week ago (2 children)

Wow, that giant comb is a really cool feature for a home. It must save so much time getting ready, not having to do that by hand

/s

But yes, thanks. That clarifies what you’re trying to do

[–] ccunning 4 points 1 week ago (1 children)

I can’t believe the tool I was using had a Hair pick icon but not a shower head icon 🤣

(Also I thought I hid it better than that…good eye)

[–] [email protected] 4 points 1 week ago

More importantly, what will your neighbors say about you showering in your front doorway in view of everyone?

[–] AA5B 3 points 1 week ago

I’m not an expert so was hoping a little discussion here would encourage one to speak up. However I thought I remembered a thread discussing some vertical distance above and below where the drain horizontal joins the vent, however I didn’t find anything like that.

This site has some min-max measurements that may be useful to check against

[–] [email protected] 5 points 1 week ago (1 children)

Will there be other drains from the same room tied in? Your drawing should work but it may need to be altered a little if there's a toilet on the same branch.

[–] ccunning 4 points 1 week ago

No - just the single drain.