<Li> Polytanks--plastic polyethylene cisterns, underground water tanks, above ground water tanks, are usually made of linear polyethylene suitable as a potable water storage tank, provided in white, black or green . </Li> <Li> Aqua--known as PEX - Al - PEX, for its PEX / aluminum sandwich, consisting of aluminum pipe sandwiched between layers of PEX, and connected with modified brass compression fittings . In 2005, a large number of these fittings were recalled . </Li> <P> Present - day water - supply systems use a network of high - pressure pumps, and pipes in buildings are now made of copper, brass, plastic (particularly cross-linked polyethylene called PEX, which is estimated to be used in 60% of single - family homes), or other nontoxic material . Due to its toxicity, most cities moved away from lead water - supply piping by the 1920s in the United States, although lead pipes were approved by national plumbing codes into the 1980s, and lead was used in plumbing solder for drinking water until it was banned in 1986 . Drain and vent lines are made of plastic, steel, cast - iron, or lead . </P> <Ul> <Li> <P> Monument to water pipe in Mytishchi (Russia) </P> </Li> <Li> <P> A specific water pipe made for use with pressure vessels . The pipe can sustain high pressure - water and is relatively small </P> </Li> <Li> <P> Concrete water pipe </P> </Li> <Li> <P> Connecting to an existing water line (white pipe) with a stainless steel tapping sleeve and valve (red). A concrete thrust block is being formed behind the new connection . </P> </Li> </Ul>

When did the us stop using lead pipes