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Author:
Harryhomeowner22 (MA)
Hello, I'm trying to understand how much of an angle can a 4" sanitary T with a clean-out take? I have replaced the old cast iron clean-out and toilet drain that was attached to the main air vent, in the very top floor bathroom with a 4" PVC T and attached it with a 4" rubber coupling that will allow a little bend in the sanitary T. The reason I'm asking about how much angle I can get out of the sanitary T is because I need to pitch the T to take the 4" toilet drain at 1/4" per foot. The sanitary T in in between the main stack and the toilet. The main stack in the wall is roughly 4' from the T and then there is another 5' from the T to the toilet flange. So a total run of 9' which is a total slope of 2.25". So working from the stack wall forward, I would need to run a 4" PVC pipe in a 1" upward slope connecting to one end of the sanitary T. Then from the other side of the sanitary T, I would need to run a 5' PVC pipe 1.25" slope up to the flange. How much angle can the sanitary T take since it is attached vertically to the 4" cast iron steel pipe? Thank you!
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Author:
m & m (MD)
Try to work with and maintain the pitch that you currently have without increasing it. It's tough to increase pitch in between work that has been done already with lesser pitch. It sort of 'locks' you in to the original slope (not always, but often).
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Author:
packy (MA)
putting a slight strain on PVC is no problem. just how much strain and when it becomes a problem is hard to say.
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Author:
Wheelchair (IL)
With all due respect to you and your abilities in plumbing, You live in a region/state that requires a Licensed Plumber to perform the tasks mentioned. Did you change materials when you removed the cast iron ? What did you replace it with?
Best Wishes
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Author:
hj (AZ)
WHY do you have that sanitary tee in the horizontal line to the toilet?
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Author:
exapprentice30 (MA)
4 inch and larger pipe can have a minimum slope of 1/8" per ft. Can you post a picture or a drawing of what you are doing. Why are you using 4" and not 3" for your toilet drain?
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Author:
Harryhomeowner22 (MA)
4" sanitary T is not in-line with the 4" drain, its above it and connects the 4" cast iron air vent to the 4" drain by a small piece of 4" PVC.
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Author:
sum (FL)
your description is very ambiguous. When you said "The main stack in the wall is roughly 4' from the T and then there is another 5' from the T to the toilet flange." it seems to suggest your T is in line.
I suggest posting a picture or a sketch to help explain your configuration so the pros can give you proper advice.
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