Update: Thanks for responses below getting me off the idea of cast iron leaks -- turns out the wax ring wasn't big enough because it's on an oval shape offset flange. I didn't realize it when I followed the toilet instructions to mount their wax ring to the toilet. I'm trying a sani-seal now which is larger. If that doesn't work I'll kludge together a couple of wax rings mounted on the flange.
--- Original Post ---------------------------
I remodeled a bathroom putting in a new tile floor and replacing the toilet. Now I'm getting a lot of sewer gas smell in the bathroom and basement. I don't think it's just a wax ring problem as I was getting a sewer smell during construction even though I had a towel stuffed in the pipe. I suspect some of the joints in the 50 year old cast iron pipe may have shaken loose or it was damaged in an area I can't see.
1) Is there a way to see/test if the wax ring was installed correctly if I pull the toilet?
2) Do you think I should go ahead and swap the toilet section of cast iron in the picture below? If so should I switch from 4" waste pipe to 3" pipe (bath has a shower and sink).
--- Original Post ---------------------------
I remodeled a bathroom putting in a new tile floor and replacing the toilet. Now I'm getting a lot of sewer gas smell in the bathroom and basement. I don't think it's just a wax ring problem as I was getting a sewer smell during construction even though I had a towel stuffed in the pipe. I suspect some of the joints in the 50 year old cast iron pipe may have shaken loose or it was damaged in an area I can't see.
1) Is there a way to see/test if the wax ring was installed correctly if I pull the toilet?
2) Do you think I should go ahead and swap the toilet section of cast iron in the picture below? If so should I switch from 4" waste pipe to 3" pipe (bath has a shower and sink).
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