Just installed a new Toto toilet and now there is a sewer gas smell only when using the shower. Reinstalled toilet with new wax ring but no change. Ed
Did you install new floors?
Hard to diagnose. The problem is a trap seal: lavatory, shower, or toilet. Or..your wax ring is not sealing.
Alot of times when a flooring install is done, the flange is not set to the correct height, causing a very large gap to be filled with wax.
Is it a new shower insatll??
If it is just a toilet replacement and nothing else, that really narrows it down to the wax ring. Did you use a deep set seal? or possibly a jumbo wax ring? That may help.