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