Galvanized Pipes on a Home Inspection: What It Means
Galvanized steel water pipe rusts shut from the inside. That's why older houses with it have weak showers, rusty water after the water's been off, and leaks at the joints. It's rarely an emergency, but it's a repipe you should price before your inspection deadline.
I'm Wes Johnston, a Realtor with Trueblood Real Estate in Fishers. Before real estate I earned a construction engineering management degree from Purdue and spent about ten years designing custom homes and running their construction in Hamilton County. I'm not a home inspector, electrician, plumber or engineer, and this isn't a substitute for one. It's how I explain these findings to my own clients. Sources are linked as you go.
Short answer: galvanized supply pipe isn't an emergency if nothing is leaking, but it's near the end of its run and a repipe is coming. Get a licensed plumber's opinion and a written repipe quote during the inspection period, then negotiate a credit or price change. Active leaks get repaired before closing.
- Typical cost to fix
- Whole-house repipe about $1,500 to $15,000, most around $7,500; roughly $4.50 per sq. ft. in HomeAdvisor's estimate.
- Who to call
- A licensed plumber. Citizens Energy Group too, if the house is in its Indianapolis service area.
- Deal-breaker?
- Usually not, but a full repipe is a real number. Price it before you decide.
Cost source: Angi repipe cost guide (updated August 3, 2026); HomeAdvisor repipe cost guide (updated June 17, 2026). National figures.
- 01What are galvanized pipes and how do I know if I have them?
- 02Why do galvanized pipes cause low water pressure?
- 03Is galvanized plumbing a problem when buying a house?
- 04Can galvanized pipes have lead in them?
- 05What should I do about an active leak on galvanized pipe?
- 06How much does it cost to replace galvanized pipes?
- 07Should I ask the seller to replace galvanized pipes?
- 08I'm selling a house with galvanized pipes. Should I repipe first?
What are galvanized pipes and how do I know if I have them?
Galvanized pipe is iron or steel pipe coated with zinc to slow rust. East Bay MUD, a large public water utility, says it was common for drinking water before the 1960s and is generally not used for it today (EBMUD on galvanized pipes). Around Indianapolis, look for it in houses built before the 1960s that haven't been repiped, like the older bungalows and four-squares.
Two quick checks from the same utility, on pipe you can see in the basement or at the water heater:
- Magnet test. A magnet sticks to galvanized iron. It won't stick to copper, plastic or lead.
- Scratch test. Scrape off paint or dirt. Galvanized stays a dull gray where scratched; lead is softer and turns shiny silver.
Typical report wording: "Galvanized steel supply piping observed. Functional flow reduced." or "Galvanized piping is near or beyond its expected service life. Recommend evaluation by a licensed plumber." You may also see "mixed materials" or "dissimilar metals," which usually means part of the house was repiped and part wasn't.
Why do galvanized pipes cause low water pressure?
Because they close up from the inside. The zinc coating corrodes first to protect the steel. Once it's gone, the iron rusts and deposits build up, unevenly, in lumps called tubercles that can block water flow. EBMUD says old, corroded galvanized pipes can cause low water pressure, discolored water and leaks (EBMUD).
What it looks like in a house: a shower that drops to a trickle when someone runs the kitchen sink, rusty or brown water when you first open a faucet after the water has been off, and leaks or rust stains at the threaded joints. Try it at the showing: run the upstairs shower, then open a downstairs faucet and watch the shower.
A partial fix rarely solves the pressure. Replacing the pipe you can see in the basement still leaves the old runs in the walls feeding the upstairs bathroom.
Is galvanized plumbing a problem when buying a house?
It's a plan-for-it problem, not a walk-away problem. The pipe won't fail all at once, but it doesn't get better, and the pressure and leak issues only go one direction.
Angi lists galvanized or lead pipes, and pipes over 60 years old, among the signs a house needs repiping, along with low pressure, discolored water, visible corrosion and leaks that keep coming back after repairs (Angi, updated August 3, 2026). An older house with original galvanized supply may check more than one of those boxes.
How I'd sort it:
| What the report and plumber say | How I'd treat it |
|---|---|
| Galvanized, decent flow, no leaks | Price the repipe; negotiate a credit or plan it in the first few years |
| Galvanized with low flow or rusty water | Price the repipe now; it's a near-term project |
| Galvanized with active leaks | Leaks fixed before closing, plus a repipe credit conversation |
| Galvanized service line from the street | Ask the water utility; in Indianapolis, see the Citizens program below |
Can galvanized pipes have lead in them?
They can. EBMUD explains that the zinc coating can contain contaminants including lead and cadmium, and that if galvanized pipe was ever connected downstream of a lead pipe, lead-containing scale can form inside it and later come loose. EBMUD notes it hasn't seen that release in its own system, and that the only certain way to know is to test the water (EBMUD). It also points to filters certified to NSF/ANSI Standard 53 for lead removal, and notes boiling doesn't remove lead.
In Indianapolis there's a specific piece of good news. Citizens Energy Group estimates more than 75,000 customers may own or rent a home with a lead or galvanized service line that needs replacement, notes that many homes built before 1950 still have lead service lines, and is replacing customer-owned lines at no additional cost to the customer through a multi-year program (Citizens Energy Group, September 25, 2024). If you're buying in its service area, call Citizens with the address and ask what the service line is made of and how replacement works for that house.
Outside Citizens' area, ask the local water utility what it knows about the service line, and test the water during the inspection period if the house has galvanized pipe.
What should I do about an active leak on galvanized pipe?
Get it repaired by a licensed plumber before closing. On galvanized, leaks tend to show up at threaded joints and where the pipe meets a fitting or a newer material. A plumber can usually cut out the bad section and transition to PEX or copper.
The bigger questions are what the water has done and what the leak says about the rest of the pipe. Look for staining on the ceiling below a bathroom, soft flooring around fixtures, and damage in the cabinet under sinks. Long-running leaks are where mold and rot start; a wet basement or crawl space is its own topic on the crawl space page.
One leak on old galvanized is usually not the last one. I'd treat a leak repair as a patch and keep the repipe conversation going.
How much does it cost to replace galvanized pipes?
Angi puts a whole-house repipe at $1,500 to $15,000, with most homeowners paying around $7,500. Labor is about 70% of the bill, and the work takes from a few days in a small house to several weeks in a large, multistory one (Angi, updated August 3, 2026). HomeAdvisor estimates about $4.50 per square foot (HomeAdvisor, updated June 17, 2026). Both are national figures.
| Item | National range | Source |
|---|---|---|
| 1,500 sq. ft. house | About $6,750 | HomeAdvisor |
| 2,500 sq. ft. house | About $11,250 | HomeAdvisor |
| PEX pipe, per linear foot | $0.40 to $4 | HomeAdvisor |
| Copper pipe, per linear foot | $2 to $12 | HomeAdvisor |
| Plumbing permit | $50 to $500 | Angi |
| Drywall repair afterward | About $300 small; $900 or more larger | Angi |
| Water main (street to house) | $600 to $2,500 | Angi |
Material is part of the choice. InterNACHI's life-expectancy chart lists PEX at about 40 years and copper water lines at 70 (InterNACHI).
When I look at a report on an older house, I read the plumbing notes together. Galvanized supply, cast iron drains and an original sewer line on the same house are a pattern, not three separate items. I tell buyers to get one plumber out who can look at all of it and give one number, and to add a sewer scope if the house is old enough to have galvanized.
On a new house, supply lines today are usually PEX or copper. In an old one that's been partly repiped, look for where the materials change. Those transitions are where leaks tend to start, and they tell you how much of the old pipe is still in the walls.
Should I ask the seller to replace galvanized pipes?
For galvanized that isn't leaking, I'd usually ask for a credit or price adjustment based on a licensed plumber's written repipe quote rather than ask the seller to do the repipe. You want to choose the plumber, the material and the timing. A repipe done in a hurry before closing by the lowest bidder isn't what you want behind your walls.
For active leaks, ask for repair by a licensed plumber, with a receipt.
Unlike electricians, plumbers in Indiana hold a state license, so you can look one up yourself on the state's Professional Licensing Agency lookup before you hire or accept the seller's receipt. For timing and how the repair request works, see how the inspection period works in Indiana.
I'm selling a house with galvanized pipes. Should I repipe first?
Not necessarily. A repipe is a big project and you won't always get it back in price. What I'd do: fix any active leaks, get a plumber's repipe quote so you know the number before a buyer's inspector writes it up, and price the house with that in mind. If you've already repiped, keep the invoice and say so in the listing. "Repiped in PEX" is a real selling point on an older house.
If you know about galvanized pipe or past leaks, it belongs on the disclosure. See the Indiana seller's disclosure and what to fix before selling.
Why a Realtor Who Built Houses Reads Reports Differently
A home inspection report runs dozens of pages, and almost every item ends with "recommend evaluation by a qualified professional." That wording is there for the inspector's protection. It doesn't tell you which items are a quick fix and which ones change the deal.
I spent about ten years designing houses and running their construction before I sold them. When my clients get their report, we go through it together and sort it into what to ask for, what to take as a credit, what to just fix yourself later, and what needs a specialist before the inspection deadline. If you're buying or selling in central Indiana, I'm happy to do the same for you.
Construction engineer turned Realtor. Straight answers before you sign.
Send Me the Page That Worries You
Tell me the address and the finding. I'll tell you how serious it looks from a builder's point of view and how it usually gets handled in a deal.
Send a MessageWhat's Your Home Worth?
Selling an older home? Start with a realistic price based on recent local sales.
Have a Plumbing Question?
Send the address and the line from the report. I'll get back to you with how serious it looks and how it usually gets handled.
General guidance from a Realtor with a construction background. Hire the licensed trade for the diagnosis and the fix.
General information from a Realtor with a construction background, not plumbing, health or legal advice. Repipe costs are national figures from Angi (updated August 2026) and HomeAdvisor (updated June 2026); Indianapolis-area quotes vary. Have a licensed plumber evaluate pipe findings, and test the water if lead is a question.