Galvanized pipes and repiping: what homeowners in older homes need to know.

If your home was built before about 1970, there is a good chance it has galvanized steel water pipes. They were built to last around 40–50 years — which means almost all of them are now past their design life. Knowing the warning signs, and what a fair repipe looks like, protects you from both surprise failures and overpriced quotes.

Signs your galvanized pipes are failing

Galvanized pipe corrodes from the inside out, so problems show up at the tap before the pipe visibly leaks:

• Discolored or rusty water, especially first thing in the morning.
• Low water pressure that has gotten worse over years (internal corrosion narrows the pipe).
• Uneven pressure — hot side weaker than cold, or one fixture much worse than others.
• Visible rust, flaking, or bubbling at threaded joints.

What a repipe costs

A whole-home repipe typically runs $4,000–$15,000 depending on the number of bathrooms, the number of stories, whether walls are open, and the material chosen (PEX is usually cheaper and faster than copper). The single biggest cost driver is access — opening and patching drywall. A quote that seems low may be excluding the drywall repair; one that seems high may be assuming worst-case access.

What a complete scope must include

A thorough repipe quote should spell out:

• Which lines are being replaced (hot, cold, both) and the material.
• Whether it is a whole-home repipe or only the failing sections.
• Drywall cut-out AND patch/finish — confirm who handles repair and paint.
• New shutoff valves and fixture connections.
• Permits and inspection, where required.
• A written warranty on the new piping and the labor.

Repipe vs. spot repair

A single leak can sometimes be repaired — but on galvanized pipe near the end of its life, fixing one joint often just moves the next failure a few feet down the line. If you are seeing system-wide pressure loss or discoloration, a partial repair is usually a short-term patch. Ask the contractor to be explicit about whether they are solving the problem or deferring it.

The bottom line

Get the material and scope in writing, confirm drywall repair is included (or budget for it separately), and be skeptical of both unusually cheap quotes (likely excluding finish work) and full-replacement quotes when only a section is failing. A second quote is almost always worth it on a job this size.

This guide is general information, not professional advice. Always consult a licensed professional before undertaking repairs.