Cast Iron Stack Crack--Why?
I wasn't sure whether to post here or in Plumbing.
We just discovered a significant leak in the main cast iron stack of our 3-story + basement 100 year old home. We found the crack behind the second floor toilet after removing a bit of drywall.
The current plan is to professionally cut out that section and replace accordingly. I am in a conundrum though as to whether some preventative replacement would be worthwhile.
We are currently in the midst of a first floor kitchen renovation and the entire stack is currently exposed down through the basement. The top (third floor) is still behind the wall and presumably damage-free.
I understand that cast iron is a great insulating product and should last for a LONG time. I am inclined to keep the cast iron in-tact but if this is a sign of things to come, I suppose I should replace more.
Does anyone know the reason for a crack in the cast iron? Is one crack symptomatic of future cracks?