Five Signs Your Home Needs a Repipe (and Three That It Doesn't)

Repiping is a real project and shouldn't be sold off a single leak. Here's the honest line between the two.

Signs it's the system

• Pinhole leaks in more than one room. When failures appear in unrelated runs, the pipe itself is at the end of its life.
• Original polybutylene supply piping. Gray poly fails at the fittings and from the inside; patching it tends to lead to the next patch.
• Galvanized steel supply. It closes up with corrosion, which shows as falling pressure at several fixtures at once.
• Discolored water on first draw at multiple fixtures. One fixture is local. Several is the supply.
• You're already opening walls. If a remodel has the walls open, repiping then costs a fraction of doing it later.

Signs it isn't

• One leak, one location, otherwise sound piping. Repair it and move on.
• Low pressure at a single fixture. That's usually an aerator, a cartridge or a seized angle stop.
• High static pressure stressing fittings. Fix the pressure — a gauge on a hose bibb and a pressure-reducing valve at the entry — before condemning the pipe.

What a good repipe includes

Mapping every fixture run before a wall is opened; a manifold or home-run layout so one bad run can be isolated; a pressure test and inspection before anything closes; and neat, paint-ready drywall patching. If a quote doesn't mention the test and the patching, ask.

How long does a whole-home repipe take?

It depends on the size of the house, the number of fixtures and how the new runs can be routed. What matters more is the plan: before work starts, you should know which days you'll have water, which rooms are affected, and when the walls will be patched.

PEX or copper?

Both are proven. PEX is flexible, needs fewer fittings inside the walls and doesn't suffer the scale buildup and pinhole corrosion that hard water causes in copper. Copper is rigid, long-lived and still preferred by some homeowners. The right choice depends on your water and your house, and whoever recommends one should be able to tell you why.

Can I repipe one section at a time?

Sometimes. If the failures are confined to one area — a bathroom group, or the runs in one wing — replacing that section can be reasonable. If the whole system is the same failing material, piecemeal work usually costs more in the end, because every future leak means another opening.

Does a repipe need a permit?

Repiping normally requires a plumbing permit and an inspection before the walls are closed. The permit should be included in the quote and handled by the contractor — not left to you.