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 Need help IDing cast iron fitting/transitioning to PVC
Author: md9918 (MD)

I had a cracked shower trap under my slab and spent several evenings digging it out. It was connected to this wye:


I cannot tell what that end is (i.e., male/female and 2" or 1.5" ). Its OD is approx 2.5", and fits into this:



Which, unsurprisingly also has an ID of about 2.5".

So my questions are: 1) what in the hell am I looking at? Is that a 2" street wye that was going into a 2" fitting? and 2) How do I transition whatever it is to PVC? I saw that Fernco makes push-in couplings, but only for 4" and 6". Is the answer that I have to keep digging until I find a run of straight pipe and put a regular Fernco on it? I really hope that's not the answer.

Edit: I'm showing my age here-- apparently I need a compression donut. Just trying to figure out now if the cast iron is service weight or extra heavy.



Edited 1 times.

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 Re: Need help IDing cast iron fitting/transitioning to PVC
Author: Lorensr (CA)

Your first photo should show more of the fitting. Also if the ID is 2.5 ", it can't be a 2 inch fitting so please try to explain again.

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 Re: Need help IDing cast iron fitting/transitioning to PVC
Author: NP16 (OR)

quote: Is the answer that I have to keep digging until I find a run of straight pipe and put a regular Fernco on it? I really hope that's not the answer.

Probably not a bad idea and then it won't matter what that fitting is.

Find the main cut out a 3 foot section or so and use Fernco's with shields to install a new section of plastic pipe. install a wye or comby, vent, and trap for this shower. May be possible to horizontal wet vent depending on where the sink drain and vent are.

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