When old galvanized or failing copper keeps springing leaks, patching costs more than it solves. A repipe replaces your supply lines once — cleanly, to code, with the walls put back right.
Written bySteven Lockhart
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Reviewed byMiguel Lopez, Owner & Licensed Plumber, New Pro Plumbing (CSLB #974600)
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Last reviewedJune 2026 · 9 min read
Quick Answer
A whole-house repipe replaces your home’s failing water supply lines — typically old galvanized or pinholing copper — with new copper or PEX, all at once, to code. New Pro repipes Westside homes cleanly and with permits, restores walls properly, and quotes a flat rate, so you stop paying for endless patches and get reliable water pressure and quality back.
A whole-house repipe is the replacement of all the water supply lines in a home — the pressurized pipes that carry hot and cold water to every fixture — typically because the existing pipe has reached the end of its service life. This page is part of our complete guide to residential plumbing services. On the Westside, the usual driver is original galvanized steel: it corrodes from the inside out, narrowing until pressure drops and rusty water appears, then fails at the threads. Once a system reaches that stage, fixing one leak just moves the problem down the line — which is when a repipe stops being optional and starts saving money.
A whole-house repipe is the complete replacement of a home’s water supply lines — usually old galvanized or failing copper — with new copper or PEX, done to code and inspected, to restore flow, water quality, and reliability.
Repeated pinhole leaks, rusty or metallic-tasting water, pressure that has quietly fallen over the years, and visible corrosion at exposed pipe are the classic signs. If you are patching leaks every season, you are likely paying more in repeated repairs than a repipe would cost once.
Both are excellent modern materials. Copper is rigid, time-proven, and time-tested in our climate; PEX is flexible, fast to install with fewer joints, and resists the kind of corrosion that doomed galvanized. We recommend based on your home’s layout, your preference, and budget — and explain the trade-offs rather than defaulting to one.
Galvanized steel pipe was standard in homes built through the mid-twentieth century, and much of West LA still has it. Over decades, the protective zinc coating wears away and the steel beneath corrodes from the inside, building up rust and scale that narrows the pipe. The result is falling pressure, discolored water, and eventually leaks at the corroded threads.
No amount of patching reverses internal corrosion — the rest of the pipe is aging at the same rate, so a repair on one section is quickly followed by a failure on another. That is the economic tipping point where replacement wins.
Early copper can also fail, developing pinhole leaks from water chemistry or thin-wall installation. When pinholes start recurring across a home, a repipe is often more sensible than chasing each one.
Rusty water or pressure that keeps dropping? Let us assess whether a repipe makes sense.
Get a Free QuoteA repipe is methodical, not chaotic. We map the existing runs, open access points strategically rather than tearing out whole walls, install the new copper or PEX, pressure-test the system, and pass inspection. Then we patch and restore the drywall and finishes so your home looks right again.
We work to minimize disruption — staging the job, protecting your space, and keeping water service interruptions short and planned.
A repipe is significant licensed work, and in Los Angeles it is permitted and inspected. New Pro pulls the permits, installs to code, and has the work inspected — which protects you at resale and ensures the system is sound. Verify our license at the CSLB (CSLB #974600).
Unpermitted repipes are a recurring problem at pre-purchase inspections; doing it right the first time avoids that headache entirely.
A 1948 Mar Vista home has rusty morning water, weak pressure upstairs, and a third pinhole leak in two years — the owner is tired of paying for patches.
New Pro confirms the original galvanized supply is corroded throughout, then repipes the home in copper to code, with permits and inspection, restoring walls cleanly.
Pressure and water clarity return across the house, the leaks stop for good, and the home now passes inspection and shows beautifully — one job instead of an endless series of repairs.
The Bottom Line
When old supply pipe is failing system-wide, patching individual leaks is throwing good money after bad — the rest of the pipe is aging at the same rate. A repipe solves the root cause once: new copper or PEX, to code, with the walls put back right. New Pro assesses carefully, repipes with permits and inspection, and quotes a flat rate.
The clearest signs are repeated leaks, rusty or discolored water, water that tastes metallic, and pressure that has fallen throughout the house over the years. Visible corrosion on exposed pipe and a build date before the 1960s (likely galvanized supply) point the same way. If you are patching leaks every season, a repipe usually costs less over time than the ongoing repairs. We assess your actual pipe and give an honest recommendation.
Both are excellent modern materials. Copper is rigid, long-proven, and durable; PEX is flexible, installs with fewer joints, and resists the corrosion that destroyed galvanized. The right choice depends on your home’s layout, your preferences, and budget. We explain the trade-offs of each for your specific home rather than defaulting to one, so you make an informed decision.
No. A repipe is methodical: we map the runs and open strategic access points rather than demolishing whole walls, install the new lines, pressure-test, pass inspection, then patch and restore the drywall and finishes. We stage the work to minimize disruption and keep water shut-offs short and planned. When we are done, your home looks right again, not like a construction site.
Galvanized steel pipe corrodes from the inside as its protective zinc coating wears away over decades. The corrosion builds rust and scale that narrows the pipe, reducing pressure and discoloring water, and eventually the steel fails at the corroded threads. Because the entire system ages at the same rate, fixing one section just shifts the problem — which is why replacement eventually beats patching.
Yes. In Los Angeles, a whole-house repipe is permitted and inspected work. New Pro pulls the permits, installs to code, and has the work inspected. This protects you at resale and ensures the system is sound and legal. Unpermitted repiping frequently surfaces as a problem during a home sale, so doing it properly the first time saves trouble later.
Cost depends on the size of the home, the number of fixtures, the pipe material chosen, and how accessible the runs are. New Pro assesses your home and quotes a flat rate before any work begins, so you know the full cost up front. Because a repipe ends the cycle of repeated leak repairs, it often pays for itself over the years you stay in the home.
Yes. New Pro Plumbing is licensed by the California Contractors State License Board (CSLB #974600) and insured, and you can verify our license at the CSLB website. A repipe is major work, so using a licensed, permitted contractor matters — it ensures the installation meets code, passes inspection, and holds up for the long life you expect from new pipe.
This page was written by the New Pro Plumbing content team and reviewed for technical accuracy by Miguel Lopez, owner and California-licensed plumber (CSLB #974600). Guidance follows U.S. EPA, U.S. Department of Energy, and California agency sources where cited. Any figures reflect New Pro Plumbing's typical practice and West Los Angeles conditions, not a quote — we confirm pricing in writing before any work begins.
What’s new: June 2026 — first publication.
When old galvanized or failing copper keeps springing leaks, patching costs more than it solves. A repipe replaces your supply lines once — cleanly, to code, with the walls put back right.
