Galvanized pipe in Rosemead's 1950s houses
Rosemead's median home dates from 1959.
Updated · 3 min read
In a nutshell
If your Rosemead house still has gray, threaded steel supply pipe, expect rust-tinted water and falling pressure as it ages. Spot fixes buy time; a repipe to copper or PEX is the lasting answer once several fixtures are weak.
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Why so many Rosemead houses have it
The Census Bureau puts the median year built for Rosemead housing at 1959. The 1950s were the city's biggest building decade, with 4,089 of 15,447 homes, per table B25034.
Zinc-coated steel was a standard supply pipe in that period. The coating wears thin inside, the steel underneath rusts, and the bore slowly narrows.
Signs to look for
Check where the pipe enters the house or under the kitchen sink. Galvanized pipe is dull gray, has threaded joints, and a magnet sticks to it.
- Brown or orange water after the tap sits overnight
- One bathroom with good pressure and another that trickles
- Pinhole drips at threaded joints
- A hot side that is weaker than the cold side
Repair a section or repipe?
A single leaking nipple at a water heater or under a sink can be swapped with a dielectric or brass fitting. That fixes the drip, but the pipe in the walls is the same age.
When three or more fixtures run weak, or leaks keep turning up in new spots, a whole-house repipe usually makes more sense than chasing joints.
How a repipe is planned in a slab or raised house
Many Rosemead houses from this era sit on raised foundations with a crawlspace, which makes running new lines easier. Slab houses usually get lines routed through the attic and dropped down interior walls.
We map each fixture, choose copper or PEX, and plan wall openings so drywall patches stay small. The water is shut off while the new lines are tied in, and fixtures are reconnected one by one.
Rosemead owners ask
How can I tell if my Rosemead house still has galvanized pipe?
Look at exposed pipe at the hose bib, the water heater or under sinks. Gray threaded pipe that a magnet sticks to is galvanized.
Will a water softener stop galvanized pipe from rusting?
No. A softener reduces mineral scale, but rust in galvanized pipe comes from the steel corroding once the zinc wears away.
Does a repipe include the main line from the meter?
It can. We look at the line from the meter to the house and include it if it is the same old pipe.