Household plumbing systems use PEX for pipes to supply water and carry away sewage. The term PEX stands for "crosslinked polyethylene." PEX piping is manufactured by melting high-density polyethylene ...

One of the big "secrets" in plumbing seems perfectly obvious once you finally realize it: The pipes don't fit together for a reason. This applies to a lot of plumbing fittings, and of course, it ...