stack

I have a back outlet, floor mount toilet that leaked behind the wall. When I removed drywall, I saw that the connection between cast iron soil stack and the plastic connector is leaking. Please see photos. What is the proper way to connect the cast iron and plastic? Should I remove and replace...

I currently have the main drain coming from the second floor and running straight down through the main floor into basement. I am wondering if it is possible to jog the stack/drain over about 7', then down <8', then back over the 7' to where it enters the basement. Trying to reconfigure...

Have an unfortunate "this is the only way this is going to work" situation with a DMV repair, resulting in the repair portion of the drain pipe, having to run 4 feet horizontally (yes, at the correct slope of 1/4"/ft) before turning up into the main vent stack...mostly above the gravel sub-grade...

Remodeling a small bathroom and adding a washer and dryer. Is the junction shaded in red below acceptable and safe? It would be a 3 inch wye that connects the shower and washer drains to the waste pipe which then flows to the main stack. My only concern the wye may impede flow from the toilet...