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 2nd floor bathtub leak into basement
Author: dvitale71 (PA)

Hi all,

I noticed a fast drip coming from the ceiling of my basement (not finished). I searched google and tried some basic troubleshooting but wanted to post my issue here in hopes of your support.

I was able to identify that the leak is coming somewhere from the hot water supply line as it shoots up to my second floor bathroom.

I ruled out the bathtub drain and replaced that today.
I also cleaned around tub and placed new caulk around the tub area
I'm unable to see the pvc pipe up to the bathroom as it's hidden behind drywall but what I can say is that the pipe only leaks when the tub faucet or shower head is running. There is no water damage anywhere that I can see as I checked drywall areas for softness. So it appears that it's a drip that runs straight down the pipe line to the basement.

For now, I've shut the water off to that bathroom until I can figure this out. My best guess is that it has to be a fixture of some sort. I'm no plumber but my educated guess is that when the water supply is active (faucet off), I assume I would see some sort of leak if there's a pipe crack. Again, if the water supply is active (faucet on), then I see the leak.

My next step is take apart the single level faucet from the tub. Is that correct? Is there anything else I should try before I need to call out a plumber? Obviously, I'm trying to save money and hoping not to tear up my walls to find the issue.

Any help is appreciated!

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 Re: 2nd floor bathtub leak into basement
Author: packy (MA)

you need to determine if it leaks when the shower is active, the tub fill is active or leaks when either is active.
first scenario involves a leak going up to the shower arm or the arm itself.
second involves a leak going to the spout.
scenario 3 involves both of those pipes being fine but the leak is at the packing around the stem or cartridge.
so, remove the handle and trim around the valve , put on your sherlock holmes hat , get a good flashlight and start investigating..
one test for the piping above the shower valve is to remove the shower head and cap the shower arm. turn the water on and if there is a leak above, you will know it..

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 Re: 2nd floor bathtub leak into basement
Author: srloren (CA)

divitale, take Packy's advice and you should be good to go.

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 Re: 2nd floor bathtub leak into basement
Author: Paul48 (CT)

What is on the opposite side of the shower wall? Would it be possible to put a pop-in access panel there?

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