Newly Installed ground floor Shower room has sewer smell.Flushing toilet causes gurgling & vacuum in shower drain

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    Welcome to Home Improvement. When you take the tour you'll note that this is a Question and Answer site, so it would be good to edit your question to actually ask a question. Also, we're going to need a lot more information about your installation - some pictures and details of the plumbing (for instance, is the plumbing properly vented?) will be really useful to help us help you.
    – FreeMan
    Commented Aug 9, 2023 at 13:18
  • Get your plumber back to make it right. Assuming a plumber installed it.
    – Ecnerwal
    Commented Aug 9, 2023 at 14:20

1 Answer 1


Sounds like there's a missing vent or a clogged vent between the toilet and the shower. Flushing the toilet sucks the water out of the shower trap and allows sewer gas to enter through the shower. If a contractor did the job, get them back to fix it. If it was a DIY job, check the venting.

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    There is a vent& it is not clogged. I wonder was the drain laid with the correct gradient?
    – Margaret
    Commented Aug 9, 2023 at 14:46
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    Do you know the exact location of the vent? Were traps installed in the shower? Won't knnow about the correct gradient unless you rip up some stuff.
    – JACK
    Commented Aug 9, 2023 at 15:23
  • The plumber that did the work is coming tomorrow. I hope that there is a solution other than digging up the floor The distance between the shower & the toilet outlet pipe is 1.4m (59")
    – Margaret
    Commented Aug 10, 2023 at 18:22

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