In my experience I've seen this type of scenario in older buildings. Usually the sink will tie into the stack in the wall while the shower generaly connects in below the toilet also known as the closet bend. In alot of older houses and apartment complexs they have tied multiple drains together in a smaller pipe before going to a larger one. For example the lav with the tub, the kitchen sink with a tub, or all three together.
Yes but you will need a 4" pipe (3" in some codes) to pick up the waste line for example=Shower 2" line then a 2" x 11/2" tee for the basin and then 4" for the toilet waste==You cannot decrease a waste line=
Yes, as long as drain line is sized properly for toilet. 3" drain line would be minimum pipe size for toilet drain line to tie into.
typically shower drains are 2"
The wall where the plumbing enters into the shower. Also known as a wet wall because it has water pipes in it. It is recommended that the head wall have access on the wall opposite the bathroom to be able for plumbers to remove or replace control valves, drains etc.
The shower gurgles because the water is going down the pipes.
Use "Draino Gel" it works well.
Yes. Drain line must be sized accordingly for number of showers being tied into it.
I dont know, i found one in my bathroom sink today... no idea how it got there :-/
The drain is plugged somewhat between the upstairs and downstairs. Need to snake the drains.
You use it during the shower.
Down the kitchen garbage disposal. It will kill bacteria and is not harmful to pipes or the environment. Any smells coming from drains will be neutralized so bathroom drains and shower drains are also a good choice to dispose of vinegar for it's mild acid content.
Water in inappropriate places, like floors and countertops, and drains and hair anywhere in the shower.
There is one under each sink, shower base and tub. This is to reduce odour from drains.
You can use an AAV for each of these. This prevents having to cut the roof.