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Old 10-19-2011, 08:48 PM   #1
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Water From Tub Draining into Basement


We have an unfinished basement. On the ceiling (which is the bottom of the floor from my upstairs), there is a metal plate covering where the drain to the tub is. Water is flowing into that and dipping into the basement.
I checked it today by running water for a short time and it didnt leak. When my daughters took their showers this evening, it leaked. And it is not a slow leak.
Any ideas?

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Old 10-19-2011, 08:58 PM   #2
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Water From Tub Draining into Basement


The shower head pipe is a common cause of leaks like that----If you have a single handle mixer valve--remove the handle and the cover plate---run the shower---if it's leaking from the head you will see water dripping onto the mixer valve.

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Old 10-19-2011, 09:20 PM   #3
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Water From Tub Draining into Basement


Yes it is a single handle. Do I replace the handle in that situation? Or is the valve replaceable?
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Old 10-19-2011, 09:29 PM   #4
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Water From Tub Draining into Basement


The problem is up above----where the shower head pipe screws in behind the tile---

You are just opening up the cover so you can see if the leak is from the shower head--

That's the cause of leaks like you are describing more than half the time---
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Old 10-19-2011, 09:40 PM   #5
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Water From Tub Draining into Basement


I'm betting (again) on a crappy tub spout. 9.5 times out of 10 it's a crappy tub spout.
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Old 10-19-2011, 09:51 PM   #6
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Water From Tub Draining into Basement


OP said that it didn't leak when he ran the tub --only leaked when daughter took a shower.
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Old 10-19-2011, 10:35 PM   #7
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Water From Tub Draining into Basement


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Originally Posted by oh'mike View Post
OP said that it didn't leak when he ran the tub --only leaked when daughter took a shower.
From what I see on what seems like a bi-weekly basis now, it's the backpressure against a faulty or busted o-ring in the spout that causes the issue when showering.

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Old 10-20-2011, 07:49 AM   #8
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Water From Tub Draining into Basement


Sounds like a minimal amount of water so I would assume it's not on the pressure side. Could be shower water running through a bad caulk joint or failed grout or it could also be the rubber seal behind the bathtub overflow. Hang a sheet of plastic on the wall where the control handles are and run the shower for awhile and see if your problem goes away. That will rule out any issues for those three possibilities.

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