What’s the best way to repair and maintain the cast-iron pipes in my 134-year ... what sounds like a main waste line, you’ll ...

That is because there is a very strong likelihood that the pipes that delivered the water to your house have been made from iron, either cast iron or today’s modern Ductile iron pipe.

Scrape off the old wax ring from the flange, toilet base, and floor using a putty knife. Inspect the flange for cracks, rust, ...