Galvanized pipe is steel pipe coated with zinc to resist rust and corrosion. It was widely used in older plumbing and some gas applications, but over time the interior can corrode, reducing flow and affecting water quality. Modern plumbing typically uses copper, PEX, or PVC instead.
/ˈɡælvəˌnaɪzd paɪp/
Galvanized pipe is steel pipe coated with zinc to resist rust and corrosion. It was widely used in older plumbing and some gas applications, but over time the interior can corrode, reducing flow and affecting water quality. Modern plumbing typically uses copper, PEX, or PVC instead.
Why were galvanized pipes replaced in plumbing?
They tend to corrode internally over time, which can reduce flow and impact water quality.
Source: The Cooling Company
Galvanized pipe resists rust outside but can corrode inside.
Older homes may still have galvanized supply lines, which can cause low water pressure or discolored water as interior corrosion builds up.
If you notice rusty water or weak flow, have a plumber evaluate galvanized lines and discuss replacement options.
“If you notice rusty water or weak flow, have a plumber evaluate galvanized lines and discuss replacement options.”
Galvanizing steel dates back to the 18th century and was first used to protect metal in marine environments.
Are galvanized pipes still safe for drinking water?
They were once common, but aging galvanized lines can corrode and affect water quality.
How do I know if I have galvanized pipes?
They are gray steel pipes with threaded fittings and often show rust or discoloration.
Can galvanized pipes be repaired?
Short sections can be replaced, but full repiping is often the best long-term fix.
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