Hello All!

I'm in the middle of a major remodel of my property and have run into spacing problems in my full bath that goes against code, which has caused me to move the toilet over 8 inches. The problem I'm having is that the double wye that I ordered is the same length as the section its going to replace. Without the required 2" of cast iron on the top and the bottom to attach the couplings I'm unsure of how to get it to fit.

Above the straight section where the double wye is being installed, is a 4 way sanitary tee, as 2 of the connections will be decommissioned I was wondering if it would be better to cut the stack above this cast iron sanitary tee, install a sanitary tee for the sink drain, connect it to the double wye, then connet to the drain stack with a compression coupling (after drilling out lead joint). Then of course tie in the shower and toilet. If anyone knows if this would be against code that would be appreciated. Picture included below.

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Edited 2 times.

I don't see a code problem as long as everything is vented properly. I'd cut the stack below the hub and attach the double wye lower. If you can move the tee for the lav up above the floor I would do that. Are the floor joists going to be supported after you cut up that wall?