I currently have a kitchen sink on the first floor which leads to a vertical pipe (illustrated in black). I would like to connect a bathroom sink to the same vertical pipe (illustrated in orange). Can I do this using a 90 degree tee or does both pipes have to be connected separately to the vertical pipe? 
-
Is there a vent pipe anywhere? Generally you would connect two separate sinks to the same vertical pipe using a double fixture sanitary tee.– fuzzydrawringsSep 18, 2021 at 18:15
Add a comment
|
2 Answers
Use two 90 degree sanitary tees for this, one for each sink. You'll never be able to unclog the drain with a tee as you've got it shown.
If space is limited, you can use a double fixture fitting like the one below.
-
I wont be able to drain unclog the vertical pipe you mean? If I would install a inspection in the vertical pipe? I also considered two tees, but it is up in a ceiling and space is very limited.– MLENSep 18, 2021 at 17:59
-
1@MLEN Yes, you won't be able to unclog the vertical stack from either sink.– JACKSep 18, 2021 at 18:46
For reduced clearance, use a "double wye" or a "double fixture fitting" and cap off the vertical (the opening at the top).
You need the sweep for the clean-out and to prevent water crossing over or inhibiting flow when both sinks in use.
