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Old 04-21-2011, 01:50 PM   #1
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Brass p trap and ABS wall drain


I'm putting in a new bathroom vanity and vanity top. Along with this I decided to move the supply and drain pipes into the wall. The drain pipe is ABS. The p trap I'll be using is a brass one. So I understand that I'll need a 1 1/2 and 1 1/4 adapter, and I plan to put the adapter where the pipe comes out of the wall. So the adapter will lie side way, not vertical as the underneath kitchen sink one. Does it sound about right?

Also I went to HomeDepot to buy stuffs. So I tried it out a bit by putting the brass p trap extension into the adapter and screw it quite tight by hand. However, when I pulled them really hard, they came off. Is it suppose to be like that? Did I not tighten it enough? How can it keep water in if I can pull them apart like that? Do I need to do anything special when using the adapter?

Sorry for a few questions, and hopefully they are not really dumb questions (may be somewhat dumb).

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Old 04-21-2011, 01:54 PM   #2
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Brass p trap and ABS wall drain


Hopefully nothing will be pulling really hard against your p-trap after it is installed.

That being said it is not under pressure, so as long as you have the gasket in correctly, tighten accordingly, there will be no leaks.

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Old 04-21-2011, 02:08 PM   #3
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Brass p trap and ABS wall drain


I'm not sure the adapter has a gasket. It comes in two pieces. One black piece that is cemented to the drain pipe on one end and the other end that has screw threads. Another piece is a white cap with 1 1/4 hole in the middle for the trap extention and it is screwed on to the black piece.

I can move the cap up and down the trap extension with some force.

Did the one I tried miss any pieces?

Last edited by nitting; 04-21-2011 at 02:10 PM. Reason: Correction.
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Old 04-21-2011, 05:14 PM   #4
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Brass p trap and ABS wall drain


There should be a washer that goes over the brass and then the white nut. So, black adaptor, washer, white nut.
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Old 04-21-2011, 09:06 PM   #5
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Brass p trap and ABS wall drain


Quote:
Originally Posted by bob22 View Post
There should be a washer that goes over the brass and then the white nut. So, black adaptor, washer, white nut.
Sometimes the washer is built into the nut. Sounds like your type, nitting
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