I am hoping that some of the knowledgeable people on this group can
answer some questions regarding older cast iron drain stacks.


I just had an upstairs BR redone on a 70 year old home. I was prepared
to pay the plumber to rip out all the old cast iron stack and replace
but when we looked at it the inside of the stack was as clean as the day
it was installed. The plumber was pretty shocked that it looked so good.

one problem he often saw is that people will ground electrical onto the
iron water line which can speed corrosion.


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