Tying into old cast iron sewage line.
I'm currently remodeling our house and I'm finally at the master bathroom. I got a quote from several local guys all for around $1500-$2500 which is outside my budget. To be fair, their quotes included moving the water lines as well. Moving the water lines isn't an issue.
I finally pulled up the patch on the sub-floor to get to the plumbing (I'm moving the toilet and bath drains) and I came across this:
The toilet will be moving 6 feet to the left and the vent will be staying where it is.
More pics just for reference:
I'm thinking about replacing the vent pipe and everything else with PVC(DWV 40?) as well as part of the stub off the main sewage line.
My question is, if I cut the cast iron right past the part where if flanges out, can I use a Fernco? coupling on that stub for the sewage? Is there a better way to do it? My concern is that could catch some of the sewage and eventually lead to a blockage.
The toilet is moving almost 6 feet away so I have plenty of room to make sure it slopes properly and almost three feet of crawl space underneath.
The reason I want to replace the vent pipe is the half wall it will be in is going to be covered completely (after I repair the sub floor and wall it's currently in) and I don't want the Fernco? on the old sink drain somewhere I can't access.
Also, if the supply line for the toilet was placed in the wall, it would be really close/right on to the electric line/box so I'm thinking of bringing it up through the floor. Any suggestions?
I'll be calling a few plumbers tomorrow and the county to check on code/practicality just to make sure. Just looking for some advice in the meantime.
Thanks in advance.