I've seen houses where even the lavs were p-trapped with 2" just like the OP has. I think the plumbers are thinking the oversized traps will help prevent clogging and maybe avoiding using slip-joint plumbing which all seems to be made as cheaply as possible.

They must think they are giving a premium option since it would've been easier to come off the 2" T with a 1 1/2 slip bushing and trap it "normally".

OP I don't understand why it won't seal unless cross threaded or damaged. It you don't want to cut anything out then you'll just have to try some sealants or tefon tapes. When/if you do find something that works, put a plastic tray under leak points and a water alarm in tray so you know if it starts leaking again.

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Posted by MrBobDobalina

BRo.LA

Member since Oct 2011

2994 posts

Posted on 3/21/24 at 11:18 am to VanRIch

Close but we want dwv as the fittings don't need to be pressure rated. Sch 40 takes up more room that you do not have.

coupling

Edited bushing link

bushing

Trap adapter you picked is correct.

P-Trap

Extension you picked is correct.

This post was edited on 3/21/24 at 11:20 am

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Posted by baldona

Florida

Member since Feb 2016

20493 posts

Posted on 3/22/24 at 8:37 am to Turnblad85

quote:
I've seen houses where even the lavs were p-trapped with 2" just like the OP has. I think the plumbers are thinking the oversized traps will help prevent clogging and maybe avoiding using slip-joint plumbing which all seems to be made as cheaply as possible.

Plumbers don’t give a shite about future clogs for the most part if things were done ‘properly’ to them and to code.

It’s a lot more likely they had a ton of 2” leftover from another job and just used it up.

Newer bathrooms are 1 1/4” now. 2” is vastly overkill.

Op on a drain that’s low pressure there’s no reason you shouldn’t be able to get those two pieces screwed together and not leaking with pipe dope. If pipe dope doesn’t solve it then there’s a crack or another issue.

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Posted by chrome1007

Toledo Bend

Member since Dec 2023

112 posts

Posted on 3/22/24 at 10:30 am to VanRIch

Looks like it.
Obviously the 17 down voters that’s how they roll.

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Posted by Yewkindewit

Near Birmingham, Alabama

Member since Apr 2012

20060 posts

Posted on 3/23/24 at 8:09 pm to VanRIch

Silicon right above and right below the big plastic nut. Slide it into the seal with finger tip.

Or, flex seal liquid paint in the same place. It won’t leak and it will come loose if you need to get it off later.

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