Shower leak question

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Old 09-25-17, 07:23 PM
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Shower leak question

I accidentally noticed the wall paint bubbling in the finish basement. There is a shower stall right above it. So I stopped using the shower stall for a few days. Using the moisture meter to make sure it is dry. I went back using the shower once by myself. No further leak. The my 7yr started to use it. Immediate leak. He likes to use the foot to cover the shower drain hole so there are water accumulated. And he moved out the foot to drain all water. I assume shower drain is leaking, but why it only happens when there is some accumulated water. Regular shower doesn't incur the leak. I am puzzled. Checked the shower stall, no crack on fiberglass noticed. Thanks for the help.
 
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Old 09-25-17, 07:29 PM
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Is it a solid fiberglass floor pan or something with tile ?

First...... tell your child not to block the drain.
Second... you'll probably need to open the ceiling to look for the leak.

It could be a leaking fitting that leaks worst when a large amount of water is released at one time.
 
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Old 09-25-17, 07:39 PM
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It is fiberglass floor pan.
 
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Old 09-25-17, 07:44 PM
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Is the drain being blocked long enough for it to fill up with water and overflow ?
If not.... it's most likely a leak in the drain line.
 
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Old 09-25-17, 07:47 PM
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No. I did pay close attention to it. No overflow.

I thought the leak is not from the shower since I took the shower and no leak detected. That's why I feel puzzled after seeing leak after my son took the shower.
 
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Old 09-25-17, 07:50 PM
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During a shower the water trickles down the side of the drain line. When a lot of water is let loose... the pipe can be filled completely.

Looks like some exploration is in your future. Start with a small hole.
 
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Old 09-26-17, 02:10 AM
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If someone get out of the shower and gets water all over the floor, and the floor isn't caulked very well... that'll do it. Measure carefully to determine the source of the drip. Water can move around a little, but if the bubble is right under the edge of the shower pan, make a trip to the store for some caulk.

If the ceiling below is going to need repair anyway, just open it up to see what's going on.
 
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