Adding a sanitary tee to a old cast iron stack
Posted by Perry Lee on June 26, 2004 at 20:39:15:
Thanks in advance for any help you could give me!

I've trying to add a drain line to the soil stack in my existing DWV plumbing. The house was build in 1941, and the soil stack seems to consist of 4" hub and spigot cast iron pipe. I'd like to cut into a section of the stack and add a 4 x 2 sanitary tee for a drain. Problem is, when I compared the OD's of the no hub sanitary tee to the exisiting soil stack, they don't match. The soil stack OD seems to be just under 4", whereas the OD of the no hub tee is about 4.5" I also can't seem to find any type of retrofit couplings that would work to connect the two.

Thanks again!

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