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 ...

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Flint has replaced about 800 LSLs to date, initially specifying copper based on an informal consensus as it studied other materials. While the city will continue to use copper, there's talk of ...