7 Signs You Need to Repipe Your Home in Los Angeles

1. Rust-Colored or Brown Water From Your Taps

This is the clearest sign that your pipes are corroding from the inside out. If you turn on the hot water and it comes out brown, orange, or rust-colored — especially first thing in the morning — your galvanized steel pipes are breaking down.

Galvanized steel pipes were standard in Los Angeles homes built before 1970. They have a zinc coating that protects against rust, but that coating deteriorates over time. Once it’s gone, the steel corrodes rapidly and flakes into your water supply.

Brown water isn’t just a plumbing problem — it’s a health concern. If you’re seeing discolored water regularly, your pipes need to be replaced, not patched.

2. Consistently Low Water Pressure Throughout the House

A single fixture with low pressure usually means a clogged aerator or a local valve issue — easy to fix. But low pressure throughout the entire house almost always means your main supply pipes are corroding and narrowing from the inside.

Galvanized steel pipes corrode inward. Over decades, the interior diameter of the pipe shrinks as rust and mineral scale build up on the pipe walls. A pipe that was originally 3/4 inch inside can narrow to the point where water barely flows through it.

Los Angeles’s hard water accelerates this process. The Colorado River water delivered to most Valley homes is naturally high in calcium and magnesium — minerals that deposit on pipe walls and combine with rust to reduce flow faster than in softer water regions.

If you’ve noticed gradually declining water pressure over the years and your home was built before 1975, galvanized pipe corrosion is almost certainly the cause.

3. Frequent Leaks in Different Locations

One pipe leak is a repair. Two pipe leaks in different locations within a year or two is a pattern. Three or more means your entire pipe system is failing and you’re entering a cycle of endless repairs.

Corroded galvanized pipes don’t fail in one place — they fail everywhere at once, progressively. Each repair you make at one location doesn’t fix the underlying deterioration happening throughout the rest of the system. You’re essentially patching a failing system one leak at a time while the rest of the pipes continue to corrode.

At a certain point — and experienced plumbers know where that point is — the cost of ongoing repairs exceeds the cost of a full repipe. If you’ve had more than two pipe leaks in different locations in the past two years, a whole-house repipe is almost certainly the more economical long-term decision.

4. Visible Corrosion or White Buildup on Exposed Pipes

Take a look at the exposed pipes under your kitchen sink, in your garage, or in your crawl space. What do you see?

• Orange or brown discoloration on steel or iron pipes means active rust
• Blue or green staining on copper pipes means the copper is oxidizing — not always urgent but worth monitoring
• White or yellowish crusty buildup at joints and fittings means mineral scale from hard water is accumulating at connection points — a sign that leaks are likely forming at those joints

Any of these visible signs on exposed pipes are a preview of what’s happening inside your walls and under your floors where you can’t see. If the accessible pipes look like this, the hidden ones are in the same or worse condition.

5. Your Home Was Built Before 1970 and Has Never Been Repiped

This is the most overlooked warning sign — not a symptom but a timeline.

Galvanized steel pipes have an expected lifespan of 40 to 70 years depending on water quality and usage. In Los Angeles, where hard water accelerates corrosion, galvanized pipes in homes built in the 1950s and 1960s are operating well past their expected lifespan right now.

If your home was built before 1970 and you’ve never had a plumber confirm what material your supply pipes are made of — you need to find out. It’s a simple visual check for an experienced plumber. If they’re galvanized steel and they haven’t been replaced, you’re living on borrowed time.

The San Fernando Valley has thousands of homes in exactly this situation in neighborhoods like Granada Hills, Northridge, Van Nuys, Reseda, Canoga Park, and Pacoima — most of them built during the postwar construction boom of the late 1940s through the 1960s.

6. Hot Water That Runs Out Quickly or Takes Forever to Heat Up

This one catches people off guard because they assume it’s a water heater problem. Sometimes it is. But often the real issue is severely corroded hot water supply lines that have narrowed so much that hot water can’t flow through them at normal volume or velocity.

When hot water pipes are heavily scaled with mineral deposits, the thermal efficiency of your hot water system drops significantly. Water takes longer to reach fixtures, runs cold faster, and your water heater works harder to compensate — shortening its own lifespan in the process.

If you’ve already replaced your water heater and the problem persists, corroded supply pipes are likely the culprit.

7. Sewage Smell or Discolored Water After Plumbing Work

This one is less common but important. If you notice sewage smells or discolored water in the days after a plumber has done any work — including camera inspections, hydro jetting, or repairs — it can indicate that the surrounding pipe system was disturbed and failing sections were exposed or dislodged.

This doesn’t mean the plumber did anything wrong. It means your pipes were already in a fragile condition and the vibration or water pressure from the work revealed it. Think of it as the plumbing equivalent of a doctor finding something during a routine procedure — better to know now than later.