# Galvanized Pipe Replacement in Columbus, Ohio

> Galvanized pipe replacement in Columbus: how steel pipe scales shut inside, rusty water, the inside pipe versus the City service line, PEX or copper.

URL: https://slaterepipingcolumbus.com/galvanized-pipe-replacement/

Old threaded steel water pipe inside the house replaced with PEX or copper, with the transitions, the loosened scale and the flush handled as part of the job.

Last Updated: October 29, 2026

Old threaded steel water pipe inside the house replaced with PEX or copper, with the transitions, the loosened scale and the flush handled as part of the job.

Last Updated: October 29, 2026

**1963** Since December 1963, Columbus has not allowed new lead or galvanized service lines

**8.1%** Service lines in the City of Columbus inventory with galvanized pipe on the owner's side

**31.0%** The same owner-side galvanized share in Grandview Heights, the highest of the areas checked

**56.1%** Homes in the 43206 ZIP around German Village built before 1940, by Census Bureau count

Galvanized steel is the gray, threaded pipe that plumbed most Columbus houses built before the middle of the last century, and a lot of it is still carrying water. [Slate Repiping Columbus](https://slaterepipingcolumbus.com/) replaces galvanized water pipe inside homes in Columbus and the nearby Franklin County suburbs, with new PEX or copper run from the main shutoff to the fixtures. The work is carried out by licensed and insured plumbing contractors under the plumbing permit for the address.

The housing stock explains why this comes up so often here. Census figures put 12.0% of Columbus homes before 1940, but the share climbs past half in the 43205 and 43206 ZIPs on the near east and south sides, and above 40% in Bexley and Grandview Heights. Galvanized pipe that has not already been replaced is usually somewhere in those houses, even where an earlier owner switched part of it to copper. Most owners end up choosing a [whole-house repipe](https://slaterepipingcolumbus.com/whole-house-repiping/), and some start with a [partial repipe](https://slaterepipingcolumbus.com/partial-repiping/) of the worst section.

## How to tell the pipe is galvanized

Galvanized pipe is dull gray or silver steel with threaded joints: the pipe screws into each fitting, and the threads often show a ring of rust where they meet. A magnet sticks to it firmly, which it will not do on copper or plastic. Lead pipe, which can also look gray, is soft and shows a bright silver scratch when scraped with a key, while steel does not. The [guide to identifying pipe material](https://slaterepipingcolumbus.com/guide/how-to-identify-pipe-material/) has photos and a step-by-step check.

The best place to look is the basement near the water meter, where the service line enters and the house main begins, then along the ceiling and up to the water heater. Many houses show a mix: steel near the meter, a copper section where a leak was once fixed, then steel again above.

## How galvanized fails from inside

Galvanized pipe is steel coated with zinc. The zinc protects the steel for years, then wears through, usually first along the bottom of horizontal runs and at the threads. Once bare steel is in contact with water, it rusts.

### Scale and tuberculation

Rust and minerals build on the inner wall in rough lumps, a pattern called tuberculation. The bore narrows a little each year. A half-inch pipe can be choked to a fraction of its opening while the outside looks sound, which is why an owner can be told the pipes look fine and still have a shower that weakens every time a toilet refills.

### Why flow drops before anything leaks

Narrow pipe resists flow. One fixture alone may seem acceptable, but when two run at once there is not enough capacity, and the upstairs fixtures, which are furthest from the main, lose first. Leaks usually come later and come at threaded joints, where cutting the threads left the thinnest wall. A corroded nipple at the water heater or a weeping fitting in the basement ceiling often signals the condition of steel elsewhere. Even so, weak flow alone does not prove the pipe is the cause. A half-closed valve, a failing pressure-reducing valve, clogged aerators or a restricted service line can look the same, and the [low water pressure](https://slaterepipingcolumbus.com/low-water-pressure/) page covers how those are ruled out.

## Rusty water: the pipe, the heater or the street

Brown or orange water is the other common sign. If it shows on both hot and cold, mostly in the morning or after a trip, and clears after running, interior steel is a likely source. If it shows only on hot, the water heater may be the source. If the whole street sees it at once, work on a City main can stir up sediment. The [rusty water guide](https://slaterepipingcolumbus.com/guide/rusty-water-from-pipes/) walks through how to tell them apart, and the [guide to whether galvanized pipes are safe](https://slaterepipingcolumbus.com/guide/are-galvanized-pipes-safe/) covers the drinking-water side.

## The pipe inside versus the service line

Galvanized can be in two places, and they are separate jobs. The house piping runs from the main shutoff to the fixtures and belongs to the owner. The service line is the buried pipe from the water main to the house. The City of Columbus stopped allowing new lead or galvanized service lines in December 1963, and its public inventory lists 8.1% of service lines inside the City with galvanized pipe on the owner’s side. In Grandview Heights, also on the Columbus system, the share is 31.0%.

The City’s lead service line program replaces lead and galvanized service lines on both sides, street by street over about twelve years, at no direct cost when the scheduled work reaches a street, while funding lasts. Its LEAP program offers a 0% deferred loan of up to $10,000 for owners who replace a line sooner. Neither program touches the pipe inside the house. The [Columbus lead service line program guide](https://slaterepipingcolumbus.com/guide/columbus-lead-service-line-program/) and the [lead service line replacement](https://slaterepipingcolumbus.com/lead-service-line-replacement/) page explain how the two can be sequenced so the new interior pipe is not fed by an old service line for long.

## Galvanized to PEX or copper

Both replacement materials are allowed under the Ohio Plumbing Code. [PEX repiping](https://slaterepipingcolumbus.com/pex-repiping/) suits houses where the old steel climbed through plaster walls, because the tubing can be fished through without opening every bay. [Copper repiping](https://slaterepipingcolumbus.com/copper-repiping/) suits owners who want metal pipe and runs that stay exposed. Whichever is chosen, the new pipe is sized for the fixtures it feeds rather than copied from the old steel.

## The cutover: transitions, loose scale and cleanup

Galvanized replacement has a few steps a copper-to-PEX job does not. Water is shut off in stages and new lines are run while the old ones still serve the house. Where new pipe meets steel that stays, such as a short section at the meter side, a dielectric or listed transition fitting keeps the metals apart. Old pipe that can be reached is removed; pipe buried in plaster or between floors is cut, capped and left.

Disturbing old steel loosens scale. After cutover, flakes can lodge in aerators, showerheads, toilet fill valves and single-handle faucet cartridges. A flush of the new system, followed by cleaning those strainers, is part of the scope. If fixture flow is still weak after the flush, a clogged cartridge is a common reason.

## Permit, testing and price

Replacing galvanized water piping needs a plumbing permit. Inside the City of Columbus, Building and Zoning Services issues it at $275 for a 1, 2 or 3 family home with two inspections. In most suburbs the city issues the permit and Franklin County Public Health reviews the plan and inspects. Before walls close, the new piping is pressure tested and checked, then flushed.

Price follows the scope. A galvanized house repiped throughout falls in the typical Columbus-area range for a whole-house repipe, $4,000 to $15,000 or more, with larger multi-bath, copper or complex homes running higher. The [repipe cost guide](https://slaterepipingcolumbus.com/guide/repiping-cost/) shows what moves it, and the [guide to buying a house with old pipes](https://slaterepipingcolumbus.com/guide/buying-house-with-old-pipes/) covers galvanized found during a sale.

## What's included

- Tracing every galvanized run from the main shutoff to the fixtures, and marking what is already copper or plastic
- New PEX or copper in place of the galvanized runs in the scope
- A new main shutoff where the old gate valve is seized or leaking
- Transition fittings at the meter side and at any steel that stays
- Old steel removed where it can be reached, cut and capped where it cannot
- Flush of the new system, then cleaning of aerators, showerheads and valve strainers
- Water heater connections checked and replaced where they are steel nipples
- Plumbing permit, inspections and a pressure test

## Where galvanized pipe sits, and who replaces it

|  | Galvanized inside the house | Galvanized service line |
| --- | --- | --- |
| What it is | Threaded steel pipe from the main shutoff to the fixtures | The buried pipe from the water main to the house |
| Who owns it | The property owner | The owner's side and the City's side, split at the curb |
| Inside Columbus, who replaces it | A licensed, City-registered plumbing contractor under a plumbing permit | The City's lead and galvanized line program, or a contractor holding a City water contractor license |
| Help with the cost | None from the City program | Free during the City's scheduled street replacement while funding lasts; LEAP loan up to $10,000 |
| Typical sign | Weak flow at upstairs fixtures, rusty water after the water sits | A notice on the water bill, or the City's service line map |

## Related resources

- Learn [Are galvanized pipes safe for drinking water?](https://slaterepipingcolumbus.com/guide/are-galvanized-pipes-safe/)Galvanized steel is not a lead pipe, but it can collect lead from one. Here is how that happens, why federal rules now treat some galvanized lines as replace-required, and what old steel does to flow and water color.
- Learn [How do you identify lead pipes and other pipe materials?](https://slaterepipingcolumbus.com/guide/how-to-identify-pipe-material/)A refrigerator magnet, a coin and a flashlight answer most of the question. This guide shows what each pipe looks like, how to check safely, where Columbus's map helps, and what each material means for the house.
- Learn [Why is rusty water coming from my faucet?](https://slaterepipingcolumbus.com/guide/rusty-water-from-pipes/)Brown, orange or yellow water has three usual sources: the water heater, corroding steel pipe in the house, or work on the City's mains. A few minutes with the taps usually tells you which.
- Learn [How does the Columbus lead service line replacement program work?](https://slaterepipingcolumbus.com/guide/columbus-lead-service-line-program/)What the City replaces, when it reaches a street, who has to sign, how to check an address on the map, and how to time an interior repipe so the house is opened once.
- Decision Guide [Should you buy a house with galvanized pipes?](https://slaterepipingcolumbus.com/guide/buying-house-with-old-pipes/)Old pipe is a known cost once it is scoped, not a reason to panic. What the inspection note does and doesn't tell you, how to look up the service line on the City's map, polybutylene, and how to negotiate with a real number before closing.

## How a repipe runs

1. First call Describe the houseIts age, the pipe you can see in the basement, the leaks so far and which floors lose pressure.
2. Walk through Map and scopeMains, branches, shutoffs and fixtures traced from the meter; material, openings and permit agreed in writing.
3. Pipe day Replace and reconnectWater shut off in stages, new lines run, fixtures and the water heater reconnected.
4. Sign off Test, inspect, patchPressure test and flush, permit inspections, then the openings are closed.

## What this work looks like

Old galvanized water pipe tee in a basement ceiling with rust and white mineral crust at its threaded joints, in a Columbus house

Faucet aerator on a paper towel with its screen clogged by orange rust flakes, in an older Columbus home

New brass ball valve with a red lever on a copper line after a water meter, the old round-handled gate valve on a shelf above, in an older Columbus home

Brass dielectric union joining a copper water pipe to an old threaded galvanized nipple, in an older Columbus home

Before

After

## Galvanized pipe replacement questions

### How long does galvanized pipe last before it needs replacing?

There is no fixed age. How fast steel pipe scales depends on the water, how much it is used, the original coating and how many threaded joints it has. Most galvanized still in Columbus houses has been in service for decades. The useful test is condition: flow at the upper fixtures, rusty water after the pipe sits, and corrosion at threaded joints.

### Can I replace just the galvanized pipe I can see in the basement?

You can, and the scope should say that is what it is. The pipe in the basement ceiling is usually the easiest to reach, but the branches rising to the bathrooms are the same age and often more restricted. Replacing only the basement runs can leave narrow steel feeding the fixtures, so flow may change less than expected.

### Will replacing galvanized pipe get rid of rusty water?

If the rust comes from the house piping, replacing it removes the source. Rusty water can also come from the water heater, from work on a City main, or from a galvanized service line, so the walk-through checks whether the color shows on cold, hot or both, and whether it clears after running.

### Does the City's galvanized line replacement cover the pipes inside my house?

No. The City of Columbus program replaces lead and galvanized service lines, the buried pipe from the main to the house, on both the City and owner sides. It does not replace interior piping, and the City notes that lead hazards inside the home are not part of its replacement.

## Related services

### Whole-house repiping

Every hot and cold supply line from the main shutoff to the fixtures, replaced in PEX or copper, pressure tested and inspected under a City or suburban plumbing permit.

### Lead service line replacement

Replacing a lead or galvanized service line in copper when the City's street-by-street program is not the right fit: a leak now, a street years out, a suburb with its own system, or a LEAP-funded job.

### Partial repiping

One section of the water supply replaced, such as the hot side, a bath group, a floor or the basement main, with the boundary and the old pipe that stays written into the scope.