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 ...

We may receive a commission on purchases made from links. Two of the most common kinds of modern piping materials for plumbing work are PEX and PVC. PEX, which stands for cross-linked polyethylene, ...