I have a few brass cleanout plugs on cast iron risers, they probably have not been opened in 30 years and would not come out. I tried a 18" wrench and even a chisel with a hammer to try to drift it open and it would not move an inch. Soaked with WD-40 let sit for an hour tried again no luck.
I think my only option left is a desctructive method.
Can I drill a hole and start a cut with sawzall to cut a piece out (like a slice of cake)? and then use a plier to pull it out once a slice is removed? I don't care about the plug I can replace it with PVC plugs, but I don't want to destroy the threads (or whatever threads are left).
MC