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Old 11-01-2011, 09:01 AM   #1
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p-trap install for bathroom vanity


Does anyone have a good step by step process for installing a p-trap in a bathroom? I just put in a vanity and i'm a newbie. How do I measure for the different sizes? I believe the pipe size is 1.5 inches, but that's all I know. I looked as some plastic kits at Lowe's, but they seem really cheap and flimsy.

I still have the old chrome/metal one I removed, not sure if I can reuse that. The new faucet I bought has a plastic drain part, not sure how I'd connect that to metal.

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Old 11-01-2011, 09:14 AM   #2
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p-trap install for bathroom vanity


There is a video here that may be helpful.

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Old 11-01-2011, 03:41 PM   #3
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p-trap install for bathroom vanity


+1 orange. Excellent video.

Just a couple of ideas:
The vertical drain coming off a bathroom sink is typically 1 1/4".
The threaded fitting at the wall is often 1 1/2".

If you re-use the metal p-trap, just keep in mind that they do rust out, especially near the bottom of the "p". Look there to see if you have a weak spot.

The plastic traps do seem somewhat flimsy, but work just fine. As the video shows, anywhere you have plastic threads you use a plastic nut with a tapered plastic washer. There is such a thing as an extra thick plastic washer that adapts the 1 1/4 to 1 1/2. This is most often done (when needed) where the vertical drain meets the p-trap.

Where you have metal threads you will use a metal washer and a rubber flat-ring gasket.

There is no problem fitting metal to plastic if you use the right nut and washer combination.

I hope this helps,
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Old 11-01-2011, 06:57 PM   #4
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p-trap install for bathroom vanity


that's all fine and dandy, but what if the kit I buy doesn't have the right lengths? or the drain pipe and tailpipe don't line up? what do i do then?
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Old 11-01-2011, 08:22 PM   #5
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p-trap install for bathroom vanity


Quote:
Originally Posted by gtothek View Post
that's all fine and dandy, but what if the kit I buy doesn't have the right lengths? or the drain pipe and tailpipe don't line up? what do i do then?
Upload a picture and we'll walk you through it. It can be confusing but it's all rather painless.
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