: : : i've read here that a sanitary tee can only be used in a vertical position. I have 5' extentions to two fixtures (a wet bar sink and a lav), the lav is in the center and i have laid a sanitary tee horizontal to stub out this center fixture. is there some other fitting i should use?
: : Reply:
: : The correct fitting to use on a horizontal drain line would be a wye with a street 45 to make the stub out square. A regular ty or sanitary tee would prevent proper flow.
: : ...What are you doing about venting?
: : Good Luck. e-plumber
: I've consulted a local plumber and called the building inspector and they have approved my plans. This is a three-year old house, with the basement stubbed out for a bathroom. I am installing that bathroom now. there is a 4" stub riser for the toilet and a hole with 2" stub out for the shower. just behind the toilet stub out is a 2" (vent) line that runs up through the roof. (the main soil stack for the upper two stories of the home is "up" the line from all of this stuff). I am tapping that 2" line, teeing off with a san tee and extending 5' a 2" extension to the drains on the wet bar sink and lav. It would be nice to know what the venting is called---wet? I was told I did not need to loop vent the two fixtures because I am only going 5'.
: please advise if this sounds right to you all.
Who told you you didn't need to vent? These sinks need to be vented. The distance is really immaterial. You are creating s-traps by running this way. I will repeat, You CANNOT use a san tee on the horizontal.