I'd like to install a laundry sink and washer in basement close to an existing 4" stack and have been looking for the proper way to do it or if I hire someone, to make sure they do it properly. I am kind of confused about San-Ts, San-Ts on their backs, Wyes, T-Wyes and the slew of fittings with their proper use.
In a previous post about tees and wyes in April 2011, Swade Plumbing said:
"Tee's on their back are no gouda.You have to have a "long sweep" pattern when going from vertical to horizontal. Wye's cannot be used to pick up fixture drains before the fixture vent. Example, a sink drain from the outlet of a trap needs to go to a Tee in the wall. This enables the vent to function properly and prevents trap siphonage."
When he said, "Wye's cannot be used to pick up fixture drains before the fixture vent" did he mean with the run of the wye in a vertical position and out of the branch of the wye a street 45 like in photo #1?
And correct me if I'm wrong but:
I also believe this arrangement of a Wye and a street 45 out of the branch of the Wye is called a "Combo and an 1/8".
And this "Combo and an 1/8" arrangement can also be found as one piece and is called a T-Wye?
Is the orientation of the T-Wye, in a horizontal position like in photo #2, where the branch of this horizontal T-Wye is for the stub out to the laundry sink OK?
Also look at photo #3 and see if that looks up to par.
Thanks
In a previous post about tees and wyes in April 2011, Swade Plumbing said:
"Tee's on their back are no gouda.You have to have a "long sweep" pattern when going from vertical to horizontal. Wye's cannot be used to pick up fixture drains before the fixture vent. Example, a sink drain from the outlet of a trap needs to go to a Tee in the wall. This enables the vent to function properly and prevents trap siphonage."
When he said, "Wye's cannot be used to pick up fixture drains before the fixture vent" did he mean with the run of the wye in a vertical position and out of the branch of the wye a street 45 like in photo #1?
And correct me if I'm wrong but:
I also believe this arrangement of a Wye and a street 45 out of the branch of the Wye is called a "Combo and an 1/8".
And this "Combo and an 1/8" arrangement can also be found as one piece and is called a T-Wye?
Is the orientation of the T-Wye, in a horizontal position like in photo #2, where the branch of this horizontal T-Wye is for the stub out to the laundry sink OK?
Also look at photo #3 and see if that looks up to par.
Thanks
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