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What type water supply and drain (DWV) pipes were commonly used for 1970s residential plumbing?
Friday, July 6, 2018
The 1970s was a transitional period between metal and plastic piping. Although PVC and ABS pipe had been available for years, they became common by the end of the decade for drain (DWV) piping. Copper also overtook galvanized as the preferred water supply pipe during the ‘70s, and PVC began to be used for water service piping between the well or meter and the house, but not approved for water pipe inside homes.
Galvanized steel faded in popularity during the 1970s.
Copper became the “gold standard” for dependability.
PVC (white plastic) used for water service piping to house (not inside), and other exterior locations.
Copper was used for smaller diameter (up to about 3”) DWV pipes, primarily during the first half of the decade.
Cast Iron was used for larger DWV pipes, primarily during the first half of the decade.
ABS (black plastic) pipe became more common for DWV piping in the last half of the 1970s.
PVC (white plastic) also came into common use during the latter part of the decade.
Orangeburg (bituminous fiber pipe) was used for sewer laterals up to 1973.
See our blog post for What do the ABS, PVC, CPVC, PB, and PEX plumbing pipe names mean? for the chemical composition behind all those acronyms. Also, you might want to read How can I tell what type of plumbing pipe I have? and What is the difference between water pipe and sewage (waste) pipe? and Are plastic pipes (PVC, CPVC, and PEX) safe for drinking water?
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Here’s links to a collection of our other blog posts about PLUMBING PIPES:
Cast Iron Pipe
Orangeburg (bituminous fiber) Pipe
PB (Polybutylene) Pipe
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