Why Older Folsom Homes Still Have Galvanized Pipes (And What to Do About It)

Galvanized steel pipe was the standard material for residential water supply lines for much of the 20th century, and it shows up regularly in Folsom's older housing stock, particularly in and around the Historic District near Sutter Street. It was a reasonable choice at the time: sturdy, widely available, and standard practice for decades before copper and later PEX became the norm.

The problem isn't that galvanized pipe was a bad choice, it's that it has a finite lifespan that most of these installations have now exceeded. Galvanized pipe is steel with a zinc coating meant to resist corrosion, but that coating degrades over decades of use, and once it's gone, the steel underneath corrodes from the inside. Because the corrosion happens inside the pipe, it's invisible from the outside, the pipe can look completely intact while its internal diameter has narrowed significantly from decades of rust and mineral buildup.

That narrowing is what produces the most common symptom: water pressure that's dropped gradually over months or years. It happens slowly enough that many homeowners don't notice until it's significant, sometimes only becoming obvious when they compare notes with a neighbor in a newer home or visit a friend's house and notice the difference. A second common symptom is discolored water, a rust or brown tint, especially right after a faucet has sat unused for a while, as loosened rust and sediment flow out with the first burst of water.

Beyond reduced pressure and discoloration, aging galvanized pipe is also more prone to pinhole leaks, small perforations that develop as corrosion eats through weak points in the pipe wall. These often show up as a slow, persistent damp spot rather than a dramatic burst. It's common for one pinhole leak to be followed by others in different spots on the same line within a relatively short window, since if one section has corroded enough to leak, nearby sections are usually not far behind.

Not every symptom means the whole system needs replacing immediately. We inspect before recommending a full repipe, cutting into a wall or two to check pipe condition at representative points rather than assuming based on the house's age alone. Sometimes a partial repipe addressing the worst sections is the right, more cost-effective call. Other times, especially with a home that's had multiple pinhole leaks in different spots, a full repipe genuinely is the more sensible long-term fix rather than continuing to chase individual leaks as they appear.

When a repipe is warranted, PEX is typically our recommendation for residential work today. It resists the corrosion that ends galvanized pipe's life, and it handles minor ground and structural movement better than rigid copper, which matters given the clay and sandy-loam soil common across Folsom. Copper remains a reasonable choice for certain exposed runs or where local code specifically calls for it, and we'll walk through the real tradeoffs for your specific situation rather than defaulting to one material automatically.

A full repipe is understandably a bigger decision than most plumbing calls, both in cost and in the disruption of wall or ceiling access needed to run new lines. We sequence the work to minimize how long any part of the house goes without water, and we coordinate drywall patching so you're not left with open walls longer than the plumbing work itself requires. Most single-family repipes are completed within a few days depending on the home's size and how accessible the existing lines are.

If you're weighing whether now is the right time for a repipe versus continuing to repair individual leaks as they come up, it helps to think about the trend rather than any single incident. One pinhole leak in an otherwise trouble-free galvanized system might genuinely be an isolated event worth a spot repair. Two or three leaks within a year or two, especially in different areas of the same line, usually signal that the whole system has reached the end of its practical life, and continuing to chase individual leaks at that point tends to cost more over time than addressing the system as a whole.

Homes changing ownership are also a common trigger for this conversation, since a home inspection will often flag original galvanized supply lines as a material past its expected service life, even if no active leak is present yet. Addressing it proactively, either before listing a home for sale or shortly after purchasing one, is often less stressful and less expensive than waiting for a failure to force the issue during a less convenient moment.

If you're currently in the process of buying an older Folsom home and the inspection report mentions galvanized supply lines, it's reasonable to ask the seller for a plumbing assessment before closing, or to factor a future repipe into your negotiation, rather than treating the mention as boilerplate inspection language that doesn't require action. A clear picture of the pipe's actual remaining life, rather than just its age, helps you make that decision with real information instead of a guess about how much time is actually left before a real problem develops.