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Any ideas what i can do to fix this without tearing out the shower?

shower drain never backs up, but pipe below it does leak below shower floor and only when taking shower. See pics.

The drain must be leaking. It gets wet inside that wall and with long showers, it leaks out onto the finished floor.

Pic 2 is the lower part of that wall you see in the other pic (red box). With that blue plastic wall cover removed.

wet with every shower where the yellow X is and then gets wet where the black X is with longer showers. shower drain is just a few inches higher and never backs up.

This shower was installed over 10 years ago and this issue just started happening in the last 8 months. Started shortly after i had the outside sewer line replaced and tenant moved in at same time. maybe coincidence. Maybe previous tenants never took long showers.

The other day we did run a snake down the shower drain at least 10 feet. that is well into the new sewer line that was replaced about 8 months ago. Its still getting wet as mentioned above after snakeing.

pics View: https://PLACE IMAGES DIRECTLY INTO POST - CLICK UPLOAD OR COPY AND PASTE THEM INTO THE POST. IMGUR IS BLOCKED./a/vR4G1ic
 

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JCplumb

Esteemed
Plumber
Advent Win
Is that expanding foam used to support the tray? Wow :D
Maybe remove all the foam, then you can get to and repair/replace the trap and waste pipe then prop the tray with something better than the foam.
Heavy tenant maybe?
 

moonlight

Plumber
Gas Engineer
Advent Win
It could even be the seal around the shower tray. If the expanding foam was not under there, you could run water into the waste only and look. If no appearance of water run a little at the back edge of the tray and watch.
 

Ben-gee

Esteemed
Plumber
I would think almost anything will be an improvement on expanding foam!

The aim in to get something nice and solid with no movement, preferably something that could withstand getting wet.
 
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Missing rubber gasket? But it looks like the pipe is below the lower edge of the keyed drain assembly. What about using underwater rated caulking? Any other options that don't require removal of shower pan?

Everything there is 10 years old.
 

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