I have to add a wye onto a vertical 4” pvc drain pipe in my wall. There’s a 90degree horizontal –to-vertical turn elbow at the top of this pipe, so I expect almost no wiggle room in pushing up. And a similar vertical-to-horizontal turn at the bottom of this pipe. If I cut and remove just enough of the vertical pipe (as measured by the new fitting's inner-hub to inner-hub dimension) , I’m concerned that I wont be able to push the two vertical cut ends apart enough to install the fitting. Is there any trick to this? Or just keep cutting off a little more and push apart really hard until it fits and grabs at least “a little”? And if so, what's a good definition of "a little"?
Advice appreciated.
Thanks
Advice appreciated.
Thanks