The San Fernando Valley is a repiping graveyard. If your home was built between 1920 and 1965 — and most of Sun Valley, Arleta, Pacoima, Reseda, Van Nuys, and North Hollywood were — it almost certainly has galvanized steel supply pipes. LA's mineral-heavy water has been corroding them from the inside for 60+ years. The question is rarely "do I need to repipe?" but "how long can I put it off?"
Here are the seven signs that tell us — and should tell you — that your home has crossed the line from "patch as needed" to "replace before a failure catches you off guard."
1. Rust-Colored Water at First Flow
Run a cold tap for 5 seconds after it's been sitting overnight. Is the first water orange, brown, or tea-colored? That's iron oxide — rust — flaking off the inside of your galvanized pipes. It clears up after 10 seconds because you're flushing the stagnant section, but the rust didn't go anywhere; it's continuously accumulating and continuously flushing. And it stains laundry, porcelain, and grout.
2. Pressure That's Gotten Noticeably Worse
Galvanized pipes don't fail by leaking — they fail by narrowing. The inside of a 3/4" galvanized line after 50 years is often 3/8" or less of actual open passage, clogged with crusty mineral and rust buildup. You notice it as:
- The shower loses pressure when the washing machine fills.
- Two showers running simultaneously produces a dribble at the second one.
- Cold water takes longer to reach the fixture because the flow rate is reduced.
- A pressure gauge on a hose bib reads 40 PSI or less (should be 55–75).
3. Visible Rust at Joint Connections
Crawl into the access panel behind the water heater or the cabinet under the kitchen sink. Are the threaded joints crusty, flaking, or orange? Are there white crystalline mineral deposits around the fittings? Those are the pipe telling you it's going through slow-motion rupture. Every winter temperature swing takes it a little further.
4. A Plumber Has Patched the Same Line Twice
Galvanized failures are never "just this one spot." They're a system-wide condition. A single fitting that's been replaced twice in three years is a preview of the other 40 fittings in your home. At that point, spending on patching is worse than useless — it's a tax on eventually repiping anyway.
5. Pinhole Leaks in Copper Sections
Many SFV homes had partial copper updates in the 1970s–90s while leaving the rest of the house galvanized. The problem: where galvanized meets copper without a dielectric union, galvanic corrosion accelerates pinhole failure in the copper. If you've got pinholes in copper next to galvanized — that's not a coincidence, and patching copper while leaving galvanized upstream is throwing money away.
6. A Water Bill That's Climbing Without Explanation
Galvanized pipes that have been corroding for decades often start weeping at joints deep in walls or under slabs — too slow to show up as a visible leak, but enough to spike your water bill over a year. If your DWP bill has crept up 15–30% without a change in usage, it's worth calling us for a leak detection visit. Often the cause is the pipes themselves, which means the fix is repipe.
7. You're Planning to Sell in the Next 5 Years
Buyer's inspectors will find the galvanized. "Galvanized supply pipes" in an inspection report either kills the sale or forces a $10,000+ price credit. Proactively repiping before listing — in copper or PEX — becomes a selling point ("new repipe, full permits") rather than a deal-breaker. The math almost always works out in favor of the pre-sale repipe.
What a Repipe Actually Costs in the SFV
| Home size | PEX | Copper Type L |
|---|---|---|
| 1,200–1,400 sq ft | $5,800–$8,500 | $9,500–$13,500 |
| 1,400–1,800 sq ft | $7,000–$10,000 | $11,500–$15,500 |
| 1,800–2,400 sq ft | $8,500–$12,500 | $13,500–$19,000 |
| 2,400+ sq ft | $12,500 up | $19,000 up |
Includes permits, pressure test, city inspection, base drywall patching. Not included: paint, tile work, or specialty finishes where walls get cut. We scope and quote before starting — no "change orders" later.
Deciding between copper and PEX? We wrote a separate guide to galvanized replacement costs in LA with the trade-offs spelled out.
Ready for a real repipe quote?
Plumbing Geeks is C-36 licensed, family-owned, and dispatches 24/7 with no overtime charges. We serve the San Fernando Valley and the rest of the San Fernando Valley and Greater LA from our Sun Valley base.