blue96bird
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I am replumbing a bath and was told by my local plumber the you are not supposed to thread PVC into cast iron. The 4" stack has a 1 1/2" threaded hole where the old galvanized sink drain was joined and a previous plumber unscrewed the galvanized and threaded PVC into it. The threads look like they match, and it has been in place for 10 years and is not leaking.
If this is not proper, what is the proper way to transition this?
If this is not proper, what is the proper way to transition this?