The word "plumbing" comes from the Latin plumbum for lead, as pipes were once made from lead.
The use of lead for potable water declined sharply after World War II because of increased awareness of the dangers of lead poisoning. At this time, copper piping was introduced as a better and safer alternative to lead pipes.[3]
(wikipedia.org)
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| COPPER PIPE (store.aihalaska.com) |
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| LEAD PIPE (laxmiengineeringworks.com) |
