Can the drains for a shower and sink come before the drain for the toilet Example the sink and shower then comes toilet then enters main stack?

Answer 1

Sure, honey, the drains for the shower and sink can definitely come before the toilet drain. As long as everything eventually connects to the main stack, you're good to go. Just make sure you follow local Plumbing codes and use proper fittings – we don't want any leaks causing a stink!

Answer 2

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.

Answer 3

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=

Answer 4

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.