Decision Guide
Epoxy lining coats the inside of the pipe you already have; a repipe replaces it. Both are real options for some houses. Here is how lining works, where it reaches its limits, and the questions that decide between them.
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Short answerRepiping replaces the old supply pipe with new PEX or copper. Pipe relining, usually epoxy lining, cleans the inside of the existing pipe and coats it. Lining can suit sound metal pipe where access is hard, but it can't fix plastic pipe, failed fittings or walls too thin to clean, and its record is shorter than copper's.
Repiping vs pipe relining is a choice between replacing the pipe and coating the inside of the pipe you have. Both are real methods, and each suits some houses better than others. Level Repiping Charlotte arranges whole house repipes, partial repipes and pipe repairs across Charlotte and the surrounding counties through licensed and insured contractors. Level Repiping Charlotte does not offer pipe lining, which is worth knowing as you read. This guide explains how epoxy lining works, what it can and can’t treat, and the questions that decide between the two.
Epoxy lining, often called pipe relining, treats the inside of existing supply pipe without removing it. The process generally runs like this:
The equipment connects at points such as the main, the water heater and fixture connections, and it works through sections of the system at a time. A coating approved for drinking water should be certified to NSF/ANSI 61, the standard for materials in contact with potable water.
Lining makes sense on paper in a specific case: metal pipe that is still structurally sound but corroding inside, in a building where reaching the pipe is hard. Cleaning removes the scale that narrows old galvanized pipe, so flow can improve, and the coating separates the water from the metal. It can seal very small pinholes. Because it works through the existing pipe, it can mean fewer openings than running new pipe to every fixture, which is why it is offered for apartment and condo buildings with pipe inside shared walls.
| Question | Lining | Repiping |
|---|---|---|
| Pipe material it suits | Metal pipe: copper and galvanized steel | Any existing material, replaced with PEX or copper |
| Polybutylene, CPVC or PEX | Not a candidate | Replaced |
| Pipe wall already thin or split | Cleaning can open weak spots; the pipe has to be sound enough to blast | Old pipe is retired |
| Failed fittings and joints | The coating may not reach or seal a failed joint | Every joint is new |
| Fixture shutoffs and valves | Not renewed unless replaced separately | Normally replaced as part of the job |
| Layout and routing | Unchanged, including lines under a slab or in cold spots | Can be rerouted, for example out of a slab or away from foundation vents |
| Inspection | Coating can’t be seen after it cures; quality depends on process | New pipe is pressure tested and inspected before walls close |
| Track record | In use for decades, a shorter record than copper’s | Copper has the longest record; PEX has been widely used for decades |
Two of these deserve more explanation. First, material. Lining systems are made for metal pipe. Polybutylene fails in the plastic itself and at its crimp fittings, and CPVC that has turned brittle cracks under stress; coating the inside of either does not touch those causes. Second, layout. Lining keeps every existing route. If the real problem is pipe under a slab, pipe in a cold crawl space, or a system that was undersized from the start, lining preserves that problem with a new coating inside it.
Most Charlotte houses that need new pipe fall into three groups, and lining fits them unevenly.
Polybutylene houses, mostly built from the late 1970s to the mid-1990s, are not candidates for lining at all. Of the 81 Mecklenburg plumbing permits from April 2025 to October 2026 that describe a repipe, 14 name polybutylene. See polybutylene pipe replacement.
Galvanized houses in older central neighborhoods are lining’s natural target, since cleaning removes scale. The question is whether the steel is still sound after decades of rusting from the inside, and whether its threaded joints, where galvanized pipe is thinnest, will hold. See galvanized pipe replacement.
Copper houses with pinholes depend on why the pinholes formed. Charlotte Water’s supply is soft and low in alkalinity, and the utility adds lime to raise the pH for corrosion control, but pinholes have several causes, including workmanship and water velocity. Lining can seal small pinholes in otherwise sound copper; it doesn’t help where the wall has thinned along whole runs. The copper pinhole leaks guide covers the causes.
A crawl space changes the balance too. In a crawl space house, new pipe can often be run under the floor with few openings, which removes much of lining’s advantage on access.
North Carolina requires a permit for the installation, extension or general repair of plumbing, with an exemption for some single-family work of $40,000 or less. How a lining job fits those rules, and what an inspector would look at, is confirmed with the permit office for each project. A repipe has a clear inspection point: the new pipe is pressure tested and inspected before walls close. The permit guide explains the rules.
If you are considering lining, these questions help you compare it fairly with a repipe:
Ask the same set about a repipe: which material, which layout, which openings, which valves, the pressure test, the inspection and the patching standard.
Lining is worth considering when the pipe is metal, structurally sound, hard to reach, and the routes are ones you would keep anyway. A repipe fits better when the pipe is polybutylene or CPVC, when leaks keep coming from fittings and joints, when the walls are thin along whole runs, or when the routes themselves are part of the problem. The repipe or repair guide helps with the wider decision, and the repipe cost guide shows what a repipe typically costs in the Charlotte area. To talk through your pipe, call (704) 452-4386.
Questions
No. Epoxy lining systems are made for metal pipe, and polybutylene's weaknesses are in the plastic itself and at its fittings, which a coating can't fix. The established answer for polybutylene is replacement, either a whole house repipe or a partial one where only some of the pipe remains.
Often fewer, because lining works through the existing pipe from connection points instead of running new pipe to every fixture. It still needs access where the equipment connects and where fixtures are disconnected, so it is not a no-openings job. A crawl space house may need few openings for either method.
Ask for the exact product name and its certification to NSF/ANSI 61, the standard for materials in contact with drinking water, then look it up on the certifier's public listing. The listing also states limits such as pipe sizes and water temperatures, which matter for hot water lines.
Tell us the age of the house, the pipe you have seen and what is going wrong. Or call.
Next
Whole house repipe in Charlotte: every supply line replaced with PEX or copper, pressure tested and inspected. Typical cost published.
One leak on sound pipe is a repair. A pattern of leaks, or a pipe with a known failure history, is a question about the whole system. The evidence that separates the two is usually in the house.
Copper fails from the inside, usually at one spot first. The cause can be the water, the speed it moves, how the pipe was installed or the tube itself, and often more than one of those at once.
Both are approved under the North Carolina Plumbing Code. The house, the routes the pipe has to take and what the owner values decide between them, not a rule of thumb.
The typical Charlotte range for a whole house PEX repipe, why copper is quoted separately, how the Mecklenburg permit fee is set, and which parts of the job only a walk-through can price.
The three supply pipes found in older Charlotte-area houses, how each one was meant to work and how it fails, the signs that point to the pipe rather than something else, the rules and insurance questions around replacement, and what each scope leaves behind.
Get a repipe estimate