When you need whole-house repiping
- Galvanized steel supply pipe with rust-colored water or low pressure
- Polybutylene pipe
- Repeated pinhole leaks in copper in different locations
- Major remodels where walls are already open
How it works
- Plan the new layout, including manifold or trunk-and-branch design and new shutoff valves.
- Open small access points in walls and ceilings, using basements, attics and crawl spaces where possible.
- Run new lines, most commonly PEX or copper, and connect each fixture.
- Pressure-test, pass inspection where required, and remove the old system or abandon it in place.
- Patch access openings (sometimes by a separate drywall contractor).
How it compares
| Item | PEX | Copper |
|---|---|---|
| Installation | Flexible, fewer fittings | Rigid, more joints |
| Freeze tolerance | Better resistance to splitting | More likely to split |
| Sun / UV | Must be protected | Tolerates exposure |
| Water chemistry | Less affected by aggressive water | Can pinhole in some conditions |
Limits and when it’s not the right fix
- Repiping supply lines does not replace drain lines; those are a separate assessment.
- Homes on slabs may need attic routing, which affects layout and insulation needs.
- Water is typically off for portions of the project.
What affects the cost
We don’t publish national price figures because real quotes vary too much by region, access and the condition of your system. These are the factors that move the price:
- Home size and number of fixtures
- Number of floors
- Slab versus crawl space or basement
- Material choice
- Drywall repair
- Permit fees
Ask for a written quote that names the method, materials and any permit or restoration work before work begins.
Whole-House Repiping: common questions
How long does it take to repipe a house?
Many single-family repipes take a few days of on-site work, depending on home size, access and inspections. Drywall patching can add time.
Is PEX or copper better for repiping?
PEX is the more common choice today because it is quicker to install, resists freeze splitting, and is less affected by aggressive water. Copper remains a durable option. Local code and water chemistry can tip the decision.
Can I stay in my home during a repipe?
Usually, yes. Water is typically off during working hours and restored at night on multi-day jobs.
What is the difference between a manifold and a trunk-and-branch repipe?
A manifold system runs a dedicated line from a central distribution panel to each fixture, with individual shutoffs in one place and steadier pressure when several fixtures run. Trunk-and-branch uses a main line with tees to each fixture, using less pipe. Home size and layout usually decide which fits.
Should I replace my main service line at the same time?
If the line from the meter to the house is galvanized or lead, replacing it with the interior repipe is often wise. Otherwise the old service line can still limit pressure and add rust even after every pipe inside is new.
How do I know if I have galvanized pipe?
Galvanized pipe is dull gray steel with threaded fittings. A magnet sticks to it, unlike copper or plastic. It is common in homes built before about 1960.
