Steve Smith wrote:
Greetings,

Some details: The total vertical section of the pipe is about 2
stories plus attic, the pipe becomes horizontal at the basement
ceiling and runs for about 15' until it drops down about a foot to
the cast iron sewer that goes out to the septic tank. The pipe is
probably about 50+ years old.


If you decide to not replace the pipe, give some thought to making access
easier ten years down the road.