Signs that repiping, not patching, is the right conversation
A single failure in an otherwise healthy line is a repair. A pattern is something else. These are the signals that tend to move a quote from “fix the leak” to “replace the pipe”:
- A second or third slab leak in the same home within a few years.
- Pipe pulled out for a repair that looks pitted, thin or heavily scaled.
- Leaks showing up in more than one run, such as the kitchen line and the bathroom line.
- Pipe material with a poor track record, or a line that has been patched several times by different people.
- Plans to renovate, where opening walls and floors anyway makes the extra work cheaper.
If you are not yet sure, start with detection, which will tell you whether you have one leak or a system on its way out.
Whole home versus partial
Partial repipe
Replaces one run or one group of fixtures, such as the kitchen and laundry, or everything on the hot line. It costs less and disturbs less, and it works when the other lines test sound.
Whole-home repipe
Replaces all supply lines, typically with new pipe run overhead and fresh connections at each fixture. It is the most disruptive and the most complete, and it ends the cycle of finding leaks one at a time.
A good quote lays out both numbers. The difference is rarely proportional to the square footage, because a lot of the cost sits in setup, drywall access and fixture reconnection, which you pay for either way.
PEX or copper: the real trade-offs
| Aspect | PEX | Copper |
|---|---|---|
| Installation | Flexible tubing, fewer joints, faster to run through walls and attics | Rigid pipe, soldered or pressed joints, more labor |
| Behavior in heat | Needs protection from sunlight; attic heat affects water temperature, so insulation matters | Not affected by sunlight; conducts heat, so insulation matters here too |
| Known weak points | Fittings and manifold connections; damage if exposed to UV before it is covered | Pinhole corrosion over time in some water conditions |
| Questions to ask | Which PEX type and which fitting system will be used? | Which grade (type) of copper and how are joints made? |
Neither material is the villain. Workmanship, correct support spacing and protection from the attic environment matter more than the label on the pipe. Whichever you choose, ask for the manufacturer, the warranty on the pipe itself and the warranty on the labor, in writing.
A note on attic heat in Mesa
Summer attic temperatures can run far above the temperature of the rooms below, and a water line in that space heats up. People who repipe overhead are sometimes surprised that the “cold” tap runs warm for a while in July. This is a design detail, not a defect: ask how supply lines will be insulated, whether any can be routed through conditioned space instead and how long hot-water waiting time will change. A manifold-based layout can also affect how quickly hot water arrives.
What the job looks like
- Plan the route.Where each fixture connects, where the manifold or branch lines sit, and how access holes in drywall will be handled.
- Permit and schedule.Repiping is normally permitted work with an inspection. Confirm who requests it and when the water will be off.
- Run and connect the new lines.Overhead and through walls, then connect at fixtures, the water heater and the main.
- Pressure test and inspect.The system is tested and, where required, inspected before walls are closed.
- Close up.Drywall patches, texture and paint are often a separate line item, so ask whether they are included.
- Cap the old slab lines.Old pipe left in the slab should be capped at both ends and not left as a live dead leg.
Many homeowners combine a repipe with an epoxy lining decision for the lines that are hardest to replace. If your leak is under a single bathtub or a kitchen island, rerouting that one line may deliver most of the benefit.
When you want a second look at the numbers, SlabGuard Pros can quote partial and whole-home options next to each other, and our complete service list shows what else can be combined with a repipe.
Questions people ask
How long is the water off during a repipe?
It depends on the size of the house and the scope, but the home is typically without water for part of each working day rather than the whole project. Ask for the plan, including where you can get water for essentials.
Will I have to patch walls afterward?
Often some drywall is opened to run lines. Whether patching and paint are included varies by quote, so ask before approving the work.
Does a repipe increase my home's value?
New supply lines are a selling point for buyers who worry about plumbing, but the effect depends on the market and on how well the finish work was done. Keep the permit, warranty and invoice together with your home records.
Can I repipe only the hot water line?
Yes, partial scopes like that exist, usually when thermal imaging or testing points to the hot line as the problem. See our page on hot water line slab leaks for how that decision is made.
Last updated October 16, 2026. This page offers general information to help you understand and describe a problem; it is not a diagnosis of your home. Only an on-site inspection can confirm a leak or the right repair.