5 Signs Your San Diego Home Needs Repiping (Don't Ignore #3)

Sign #1: Your Water Looks Rusty or Discolored

Turn on a faucet that hasn't been used in a few hours — maybe the guest bathroom or the bathtub. If the water comes out yellow, orange, or brown before clearing up, that's rust from the inside of your pipes dissolving into your water.

A little discoloration first thing in the morning that clears quickly might just mean some surface rust. But if you're seeing it regularly, or if it takes a while to run clear, the corrosion inside your pipes is significant. You're literally drinking and bathing in dissolved metal.

We see this constantly in post-war homes throughout Clairemont, Allied Gardens, and San Carlos. Those homes were built with galvanized steel pipes that have a lifespan of about 40-50 years. Do the math — they're 20-30 years past due.

Sign #2: Low Water Pressure Throughout the House

If you remember your water pressure being much better a few years ago, and it's been gradually declining, the problem is almost certainly inside your pipes. Corrosion and mineral scale (thanks, San Diego hard water) build up on the pipe walls and narrow the opening.

Here's a quick test: if the pressure is low at multiple fixtures — not just one shower head — it's probably not a fixture issue. And if your neighbors have good pressure, it's not the city supply. It's your pipes.

A lot of homeowners try to solve this by installing a pressure booster or a new pressure regulator. Those can help with certain issues, but if the problem is corroded galvanized pipes that are half-clogged with buildup, no amount of pressure boosting is going to fix a pipe that's basically a straw. The solution is new pipes.

Sign #3: You Keep Getting Pinhole Leaks (Don't Ignore This One)

This is the one that gets people in trouble. You patch one pinhole leak, then a month later another one shows up somewhere else. Then another. Each one seems minor — a little drip behind the wall, a small water stain on the ceiling.

But here's what's actually happening: when corrosion eats through a pipe wall in one spot, the entire pipe system is in roughly the same condition. That first pinhole leak isn't a fluke — it's a preview. The pipe wall is thin throughout, and more leaks are coming.

We've seen homeowners in National City and Lemon Grove spend thousands of dollars patching individual leaks over a couple of years when a full repipe would have cost less total and actually solved the problem. Each leak risks water damage to drywall, flooring, and framing — damage that's way more expensive to fix than the plumbing itself.

If you've had two or more pinhole leaks in the past year, stop patching and start planning a repipe. Check out our leak detection and repair service — we can assess whether you're dealing with an isolated issue or a system-wide problem.

Sign #4: Visible Corrosion on Exposed Pipes

Take a flashlight and look at any exposed pipes in your garage, basement, crawl space, or under sinks. What do you see?

If the pipes are galvanized steel, they'll look like dull gray metal. Corrosion shows up as flaking, discoloration, dimpling, or greenish-blue deposits (especially around joints and fittings). If you see white or green crusty buildup on copper pipes, that's also corrosion at work.

Healthy pipes should look relatively uniform. If your exposed pipes look rough, bumpy, or like they're flaking apart, the pipes you can't see (inside your walls and under your slab) look the same or worse. What's visible is always the best-case scenario because exposed pipes at least have air circulation.

Sign #5: Your Home Was Built Before 1980 and Still Has Original Pipes

This one is straightforward math. Galvanized steel pipes — the standard for homes built from the 1930s through the 1970s — have a useful life of about 40-50 years. If your San Diego home was built in the 1960s and has never been repiped, those pipes are 60+ years old.

Even if you're not experiencing obvious symptoms yet, a pre-purchase plumbing inspection on a home of this age will almost always flag the pipes. If you're buying an older home in Poway, La Mesa, or anywhere in the county, insist on a thorough plumbing inspection. Many buyers get a general home inspection but skip a detailed plumbing evaluation — that's a mistake that can cost $10,000+ down the road.

Not sure what kind of pipes you have? A magnet will stick to galvanized steel but not copper. Or just look at the pipes under a sink — galvanized is threaded gray metal, copper is smooth and... copper-colored. If you find galvanized, it's worth getting a professional assessment.

PEX vs. Copper: What Should You Repipe With?

When it's time to repipe, you've got two main choices: copper and PEX (cross-linked polyethylene). Here's the honest comparison.

Copper has been the premium choice for decades. It's durable, has a long track record, and adds value to a home. It resists bacteria growth and handles heat well. The downsides? It's significantly more expensive (both material and labor), and it's susceptible to San Diego's hard water and aggressive soil conditions. Copper pipes in some areas develop pinhole leaks after 20-25 years due to water chemistry.

PEX is the newer option and has become our go-to recommendation for most San Diego repipes. It's flexible, so installation requires fewer fittings and connections (each fitting is a potential leak point, so fewer is better). It resists scale buildup from hard water, doesn't corrode, handles freezing better than copper (rare in SD, but it happens in mountain areas), and costs 30-40% less to install.

PEX has been used extensively in the US since the early 2000s and in Europe since the 1970s. It has an excellent track record. The one downside is that it can't be used outdoors where it's exposed to UV light, but that's rarely an issue for residential repiping.

For most San Diego homes, we recommend PEX. It's the better match for our water conditions, and the cost savings are real. You can learn more on our repiping service page.

What Does Repiping Cost and How Long Does It Take?

A full house repipe in San Diego typically costs between $4,500 and $12,000 depending on the size of the home, number of fixtures, accessibility, and pipe material you choose. PEX repipes are on the lower end, copper on the higher end.

For a standard 3-bedroom, 2-bath home, most repipes take 2-3 days. You'll have water shut off during portions of each workday, but we typically restore water by the end of each day. There will be some drywall patching needed afterward — we keep wall openings as small as possible and patch everything when we're done.

Is it disruptive? A little, yes. But it's way less disruptive than dealing with a major pipe failure, flooding, mold remediation, and emergency replumbing all at once. A planned repipe is always cheaper and less stressful than a forced one.