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Old 09-30-2019, 03:28 PM
 
Location: Johns Creek, GA
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Quote:
Originally Posted by NorthofHere View Post
Sounds like you might have a blockage in the drain lines. Two showers running and more water goes in the drain causing it to flow back up from the bottom of the toilet. Get a plumber out to clear the line. If you have no confidence in that plumber get another one.


Oh, I gotta see this!
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Old 09-30-2019, 10:57 PM
 
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Two showers? Water pools by toilet? High humidity, cold toilet, heavy condensation forming and running off tank and bowl onto floor?

Open a window, turn on the fan.
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Old Yesterday, 05:17 AM
 
2,014 posts, read 695,558 times
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It does not sound like a plumbing leak and my instinct would be to check the integrity of the the pan/shower base as K Bldr has mentioned.

You could seal/plug up the drain and then fill the shower base with water and give it some time. If there is a leak, water will find it’s way out1

If it’s not leaking at the base, then chances are (walls could be tested as well) it’s not leaking from above that point through the tiled walls.
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Old Yesterday, 11:29 AM
 
Location: LawnGuyLind, NY / Sarasota, FL
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In other words - lots of possibilities I have tried several of the suggestions but find nothing. The plumber who did the plumbing for the house says it can't be a plumbing issue because water can't rise up from under the tiles. Have a different plumber scheduled here soon. The problem is, no one has any idea where the pipes under the slabs are and how the plumbing is routed in the house. There was no plumbing plan by the builder. New house.
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Old Yesterday, 02:02 PM
 
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Quote:
Originally Posted by Coachgns View Post
In other words - lots of possibilities I have tried several of the suggestions but find nothing. The plumber who did the plumbing for the house says it can't be a plumbing issue because water can't rise up from under the tiles. Have a different plumber scheduled here soon. The problem is, no one has any idea where the pipes under the slabs are and how the plumbing is routed in the house. There was no plumbing plan by the builder. New house.
You can determine the underground piping by having a plumber run a camera through the piping which will locate all waste piping and branch lines as well as depth and if there are any major issues.

Iím thinking you first need to test the shower base unless youíve already eliminated that!
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Old Yesterday, 02:20 PM
 
Location: The Berk in Denver, CO USA
14,260 posts, read 20,847,633 times
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I fix my incipient plumbing leak problem by getting up 2+ times a night and draining my kidneys.
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Old Yesterday, 02:35 PM
 
Location: LawnGuyLind, NY / Sarasota, FL
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Quote:
Originally Posted by Rickcin View Post
You can determine the underground piping by having a plumber run a camera through the piping which will locate all waste piping and branch lines as well as depth and if there are any major issues.

Iím thinking you first need to test the shower base unless youíve already eliminated that!
SHower base next step. Noticed today that the floor of the water closet sounds solid on one side of the area, but on the side adjoining the shower, when tapping it, it sounds hollow.
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Old Yesterday, 02:44 PM
 
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Quote:
Originally Posted by Coachgns View Post
SHower base next step. Noticed today that the floor of the water closet sounds solid on one side of the area, but on the side adjoining the shower, when tapping it, it sounds hollow.
Most likely the backfill material around the plumbing was not properly compacted and has settled, however that issue should have nothing to do with your leak issue.

I’m also guessing the water by the toilet is not leaking from the wax seal but if so, I guess you would have already identified that!
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Old Yesterday, 02:54 PM
 
359 posts, read 70,511 times
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I think the key is that leak is only when two of you take shower closer to each other. It means more weight on the center of the shower base. If the shower base drain is not properly plumbed (say, not enough plumber putty, or not a straight angle connection, or something else), then weight from both of you in the center can open up a small hole/crack between base and the drain, allowing water to pool under the base. From there on, if there is any route to the middle of the water closet under the tile, water will travel there and yes, it can pool via small cracks (shower base is almost always higher than tile in in the adjacent water closet).

Easy way to test - load something heavy in the center of the base (to approximately match combined weight of both of you), turn water on and see what will happen.
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Old Yesterday, 02:55 PM
 
Location: LawnGuyLind, NY / Sarasota, FL
1,623 posts, read 2,526,155 times
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Quote:
Originally Posted by Rickcin View Post
Most likely the backfill material around the plumbing was not properly compacted and has settled, however that issue should have nothing to do with your leak issue.

Iím also guessing the water by the toilet is not leaking from the wax seal but if so, I guess you would have already identified that!
Correct - not leaking from the seal.

I'll keep on searching. (Or just stop showering )
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