Galvanized pipe is steel coated with zinc. Over decades the coating wears away and the steel rusts from the inside, causing brown water, low pressure and leaks. Because the damage is inside the pipe, replacing the galvanized lines with PEX-A or copper is the lasting fix.
What is galvanized pipe?
Galvanized pipe is steel pipe dipped in zinc to slow rusting. It was a common water supply pipe in homes built before modern plastic and copper systems became standard.
Why galvanized pipe fails
The zinc layer wears thin over time. Once it does, the steel rusts on the inside. Rust and mineral scale build up and narrow the pipe, which lowers pressure and discolors water, and eventually the wall thins enough to leak, often at threaded joints.
How to tell if you have galvanized pipes
Check where pipes are visible:
- Attic, garage and the lines entering the water heater.
- Under kitchen and bathroom sinks.
- Where the main line enters the house.
- Galvanized pipe is dull silver-gray, has threaded fittings, and a magnet will stick to it.
Can galvanized pipe be repaired instead?
Individual sections can be replaced, but the rest of the system keeps rusting at the same rate. Partial fixes also join new and old metal, which needs the right fittings. In most homes, replacing all of the galvanized supply lines at once is the more reliable and cost-effective choice.
What replaces galvanized pipe?
Clean Team Plumbing replaces galvanized lines with PEX-A or Type L copper. Most homeowners choose PEX-A for its value and faster installation, and notice clearer water and stronger pressure right away.
Get a free in-home inspection and a written, itemized estimate from a licensed Clean Team plumber.
Frequently Asked Questions
Is water from galvanized pipes safe to drink?
Rusty water is unpleasant and a sign of corrosion. Older galvanized pipe can also hold deposits from older water service lines. If you are concerned, have your water tested and talk to a plumber about replacement.
Does galvanized pipe hurt resale?
Buyers and inspectors often flag galvanized supply lines. Replacing them can remove an objection during a sale.