One of the biggest culprits I have found for sewer gas smell is the floor drain many floor drains are seldom if ever used and if unused long enough the water in the trap will evaporate allowing sewer gas to enter the dwelling. this also applies to any trap which is not used regularly.
the sewer is where things that you flush or put down the drain go, a drain is the opening is a sink or shower that sends things to the sewer
full block of main drain. shower is lowest open area for back up to occur.
Probably not, but where does the water from the sink and shower go and what sewer problems are you having?
The drain from the toilet to the main drain is plugged and the branch to the shower is not. If the main floor toilet flushes, it is between the two toilets and not between the house and the sewer.
Heck no as it is a very carcinogenic mixture
One drain outlet is sufficent provided the drain outlet to the sewer line or to the gully outside has the correct gradient fall.
1/8 inch per foot
Most likely a drain has dried out and there is no water in the trap to stop the gas from coming up. Sink, shower, or main floor drain.
YES !!!!!!!! Minimum 2" P Trap Yes, and it needs a wye not a tee, and it needs to be vented properly.
By cutting in a cast iron Wye so the flow enters the sewer line (soil pipe) at a right angle
Is there a floor drain or any other drain nearby that is not used often? Sometimes the p-trap in a drain will dry out and allow sewer gas to escape. The smell becomes more intense when hot water goes down the drain.
Do you have an upstairs tenant or the sewer is backing up.