Contractors should look for the CISPI mark on cast iron pipe, preferably cast into the metal on fittings and stenciled onto the pipe. They should insist that the cast iron pipe that they install be ...

This cast-iron drain pipe is more than 100 years old and is in perfect condition. (Tim Carter) ... It’s easy to adjust, and it takes just a little bit more work to install it.

The cast iron is dense and it’s very hard to get it to vibrate to create noise. PVC is the opposite. It’s not dense, and the cascading water from a toilet flush vibrates the pipe creating the ...