Galvanized Pipe vs PEX in Tustin Homes: Why Old Steel Lines Fail and What Changes When You Switch
Many older Tustin houses, especially in Old Town and the 1950s and 1960s tracts, still run on galvanized steel. How it compares with PEX-A on water quality, pressure,…
If your Tustin home was built before the mid-1960s, there is a good chance some or all of its water lines are galvanized steel. Galvanized was the standard for decades. Today it is the most common reason older homes have rusty water and weak pressure. Here is how it compares with PEX-A, the material we use for most repipes.
How galvanized pipe ages
Galvanized pipe is steel coated with zinc. Over time the zinc wears away and the steel underneath rusts from the inside. Rust builds up on the inner wall and narrows the opening. Threaded joints, where the pipe wall is thinnest, are where leaks usually start.
Side by side
Water quality. Galvanized can release rust and sediment, giving brown or orange water after it sits. PEX-A does not rust.
Pressure. Galvanized loses pressure as rust narrows the pipe. PEX-A keeps its full inside diameter.
Leaks. Galvanized leaks at threaded joints and where rust eats through. PEX-A has far fewer joints in walls, and its cold-expansion fittings make a strong connection.
Flexibility. Galvanized needs rigid runs and many fittings. PEX-A bends around corners and can be fished through walls with small openings.
Repairs. Fixing one galvanized section often disturbs rust in the rest of the line. A PEX-A system is easy to modify later.
Signs your galvanized is near the end
- Brown or orange water, especially first thing in the morning
- Pressure that has dropped over the years
- Leaks at joints near the water heater or under sinks
- Gray pipe with threaded fittings in the garage or crawl space
What switching involves
Replacing galvanized with PEX-A means new lines from the main to every fixture, new shutoff valves, and proper connections at the water heater. In houses on raised foundations, much of the new pipe can run through the crawl space. Most families stay home during the work.
Tustin homes and galvanized
Tustin has homes from the early 1900s in Old Town, mid-century houses in the 1950s and 1960s neighborhoods around the original town, and newer homes in Tustin Ranch and Tustin Legacy. Galvanized is most common in the older areas, sometimes with copper sections from past repairs. Water comes from the City of Tustin or Irvine Ranch Water District. Repipes are permitted and inspected through the City of Tustin, and Old Town properties may have extra review for exterior work.
Related reading
See what causes brown water from the faucet or read whether PEX is legal in California. Neighbors can visit Irvine, Costa Mesa and Lake Forest, or see every city we serve at repipeinc.com.
Still on galvanized?
We will check your lines and explain what switching to PEX-A involves as part of a free quote. Get my free quote. Our AI system alerts a technician instantly, so you get a fast callback.
Repipe OC, 23821 Hillhurst Drive, Laguna Niguel, CA 92677, (949) 524-2362, CSLB #1087885 C-36.
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Written by Repipe OC · CSLB #1087885 C-36 · 23821 Hillhurst Drive, Laguna Niguel, CA 92677 · (949) 524-2362