The Romans used lead or clay piping to move drinking water to bathhouses, residences and amphitheaters. As we outlined before, lead continued for being the go-to pipe for plumbing until eventually within the 1930s when galvanized steel acquired in acceptance. Connecting PEX to galvanized pipe can give a contemporary solution https://www.malleableiron-pipefitting.com/industry-knowledge/how-to-connect-non-threaded-galvanized-pipes.html