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Whole-House Repipe After a Slab Leak: When It Makes Sense

A repipe replaces the supply lines through the house, usually moving them out of the slab. It is the biggest repair on the list, and sometimes the one that ends the problem for good.

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By Pomona Slab Leak Pros · Updated November 2026

What a repipe is

Slab leak detection, floor access, copper pipe repair and finished floor shown in a collage of repair stages

A whole-house repipe replaces the home water supply pipes with new lines, commonly copper or PEX. New lines are routed through walls and the attic to the fixtures, and the old lines under the slab are taken out of service. It is one of four fixes on slab leak repair options.

When a repipe makes sense

  • Repeated leaks. Two or more leaks in the same system point to worn pipe.
  • Aging pipe. Original lines near the end of their life.
  • Pipe that cannot be lined or spot repaired.
  • You plan to stay. The cost is spread over years of use.

How a repipe is done

  1. Plan the routes for every fixture and valve.
  2. Open access points in the walls and attic.
  3. Install the new lines and connect fixtures.
  4. Pressure test the system.
  5. Patch and finish walls and paint.

What to weigh

  • Disruption. It is the largest job, with water off at times and wall patching.
  • Material. Copper and PEX both have supporters. See PEX vs copper.
  • Permits. Ask what the City requires. See Pomona plumbing permits.
  • Cost. The published cost source we use does not list a repipe figure, so we do not quote one. Ask for an itemized written price. See the cost guide.

Repipe versus repeated repairs

Ask your plumber to compare what the next five years look like with repeated spot repairs against one repipe. If the pipe is worn throughout, a repipe may cost less over time. If a single leak sits in otherwise healthy pipe, a spot repair may be enough.

Frequently asked questions

How long does a repipe take?

It depends on the size of the house and the number of fixtures. Ask for a written schedule that says when the water will be off.

Do I need to move out?

Often not, but plan for water outages and some disruption. Ask what to expect room by room.

Will walls be torn up?

Small sections are opened to pass the new lines and are patched afterward. Ask whether paint is included.

Is a repipe covered by insurance?

Usually not by itself. See whether homeowners insurance covers a slab leak and ask your insurer.

PEX vs copperCompare the two common repipe materials.Repair optionsSee how repipe compares to the other fixes.Slab leak repair costPrice ranges and what moves them.

Need slab leak repair Pomona homeowners can book? See our slab leak repair Pomona page for how we work, or call (909) 415-2610.

Water running, or a warm spot on the floor?

Shut off the main if water is visible, then call. A Pomona plumber will tell you what to do next.

Call (909) 415-2610

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