Plumbing warning signs, pipe materials, layouts and permits
Planned around what it takes to reach the pipe, not around the pipe. Access is the whole job.
When a house needs a repipe, and what the job involves
Repiping replaces every water supply line between the main shutoff and the fixtures. A house needs it when failures stop being isolated: repeated pinhole leaks, rusty or discolored water, falling pressure, or a material with a poor record such as polybutylene or old galvanized steel.
The new lines are PEX, copper or CPVC. PEX is flexible tubing that pulls through the routes the old pipe used, copper is rigid and soldered joint by joint, and CPVC is rigid plastic glued at each fitting. PEX can run trunk and branch, like the old system, or home-run from a manifold with one line per fixture.
The plumber pulls the permit, opens small sections of wall and ceiling at each fixture, runs the new lines, connects them, and pressure-tests the system before the inspector signs off. Water is usually off for part of each working day, and drywall patching follows once the walls are closed.
PEX, PEX manifold, CPVC or copper: repipe materials
| Material | Lifespan | Best for |
|---|---|---|
| PEX, trunk and branch | 40 – 50 years | Flexible tubing pulled through the existing routes, which is why it is the cheapest repipe: fewer holes, fewer hours, less drywall. |
| PEX, home-run manifold | 40 – 50 years | One dedicated line per fixture from a central manifold. More tubing, fewer joints in the walls, and every fixture shuts off on its own. |
| CPVC | 30 – 50 years | Rigid plastic, solvent-welded. Cheap and common in the South, brittle with age, and unforgiving of a hard knock in a cold crawl space. |
| Copper | 50 – 70 years | Soldered joint by joint, and priced accordingly. It outlasts everything here, tolerates heat, and fails early where the water is aggressive. |
Lifespans assume ordinary municipal water. Aggressive or acidic water shortens copper’s life, and PEX should be kept out of direct sunlight before and after installation.
Pressure-test the repipe before the walls close
A repipe is judged at the pressure test, with the walls still open. After that, the only witness to the work is the drywall
Pipe materials, signs and permits: repiping questions
What are the signs a house needs repiping?
More than one pinhole leak in a year, brown or rusty water when a tap first opens, pressure that keeps falling, visible corrosion on exposed lines, or pipe identified as polybutylene or galvanized steel. A plumber can confirm the material from the lines at the water heater and the main shutoff.
Is PEX or copper better for repiping a house?
PEX suits most houses: it needs fewer wall openings, has fewer joints, and survives a freeze that would split copper. Copper is the better choice for exposed runs, high-temperature lines and owners who want the longest service life, fifty to seventy years against forty to fifty for PEX.
What is a PEX manifold system?
A central manifold with a dedicated line to each fixture, instead of one trunk that branches off along the way. It uses more tubing and leaves almost no joints inside the walls, and every fixture gets its own shutoff at the manifold.
Is CPVC still used for repiping?
Yes, mostly in the South. It resists corrosion and is quick to install, but it grows brittle with age and cracks under impact, which makes it a poor fit for cold crawl spaces and unheated garages.
Does repiping a house need a permit?
Almost everywhere. The inspector checks the material, the supports and the pressure test before the walls are closed, and a documented, permitted repipe answers a buyer’s inspector when the house is sold.
How long does it take to repipe a house?
Two to five days of plumbing on a typical house, then drywall patching, texture and paint. Most crews restore water at the end of each day, so the house stays livable throughout.
How do I choose a plumber for a repipe?
Confirm the license and insurance, then ask how many whole-house repipes the crew has done, whether the bid ends at the pressure test or at finished walls, and what warranty covers the labor. A plumber who will not name the pipe brand and fittings is not ready to bid.
The calculator prices repipes per fixture on the same national data as every guide on this page; no phone number, no lead form.
Count the fixtures Before the first quote