Installing a new vanity, and like idiots, we forgot to account for a floating cabinet when plumbing hookups went in, so the drain outlets have about 3-4 inches clearance below, but there’s plenty of space otherwise. The plan is actually to try some waterless valve traps anyway, but if we don’t like them, or there’s some future inspection issue, can it simply be sloped up at a 1/4 -1/2 in grade? Maybe also with some bends to save space?
My plumber comes to install in a few days, and I’d like to know how much of an idiot he’ll call me
You need to either open up the wall in that bathroom or on the other side and rough the sanitary line in at the proper height. Don’t fuck around and try to reinvent the wheel when it comes to plumbing, it never works. This shit was figured out long before we got on earth by far more intelligent people than we will ever be
I don’t think sloping a pipe downwards at a 2% grade is exactly reinventing the wheel, but tearing the other side open isn’t out of the question.
If is is not carrying solids i agree but the problem would be going beyond the acceptable tollerances of the mechanical joints and glue joints of the fittings.
I have seen too many times something that is forced cause major damage. The cabinetry looks nice and rather than take the time while it is not at the point of no return to make it correct would be foolish. Sometimes you need to drop back and punt 🤷♂️
Oh ok. I was going off the assumption there was a joint meant for this, or something with some give, or I dunno maybe a heat gun? I wasn’t thinking it would just be forced.
And no solids, it’s just a master bathroom sink with no kids, so mostly soap and germs.
You need to focus on both of these two things:
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Regardless of the bends, is the pipe’s height at output significantly lower than its height at input? If yes, you’re good
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Does the bendy part go up and down enough such that it could trap enough water to fully block the pipe? If yes, you’re good
So…yes? I know there’s enough room for about a 2% slope.
It sounds like you’re probably good.
The slope itself shouldn’t matter as long as the drain hole at the bottom of the sink is still higher than the drain hole in the wall. You can also angle the p-trap itself a little bit, but it still needs to be able to hold enough water in the bottom to block the pipe.
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No photos?
There’s about 3 inches between the outlet and the bottom of these 24"x24" square cabinets.
More like 4" on the left side, but the right one is a bit lower.
Is that fresh rough in pipe? Fire the plumber or have them come back and open the walls to move those up. Or move the cabinets down tops seem custom? No ID why they are set that high above other bases? Nor why they shouldnt be moved down. You storing ferret beds under there or something?
The tops are not in. I wouldn’t go further without fixing correctly. No amount if pitch on a trap arm is gonna fix that
Nah, it’s just a design choice, it’s for my parents and they didnt want a big solid rectangle. Anyways the counter tops are in now, so that’s not changing. Personally, I would have kept the tops all level, but it does look nice and architectural all finished.
And we do all know better, and he confirmed placement with us, so it’s our fault, really, just a very stupid oversight.
Then try to offset them in the cabinet with street vent elbows and spin the trap sideways to leave room for the arms reduce to 1-1/4" trap to save some space
@[email protected] based on the image, I think a bottle trap would work and be to code most places.
https://tapron.co.uk/blogs/news/bottle-trap-vs-p-trap-choosing-right-plumbing-component
Really? It seemed to be against code in most places near me, along with S traps. I don’t live in the UK.
