What repiping means
Repiping swaps the hot and cold water supply lines inside a house for new pipe. It does not touch the drain lines, which carry waste away, and it does not replace the water line from the meter, which is covered under water line repair.
It can be done for the whole house or for part of it, such as a bathroom group. The plumber runs new lines through walls, attics and crawl spaces, connects every fixture and removes the old pipe or caps it.
Signs it may be time to repipe
Repeated pinhole leaks
When one patch is followed by another, the pipe wall is thinning.
Brown or rusty water
Galvanized steel corrodes from inside and sheds rust.
Low pressure at many fixtures
Mineral buildup and rust narrow the pipe.
Visible green or white crust
Corrosion at joints signals aging.
Flaking or bulging pipes
The pipe is nearing failure.
A recalled or problem pipe material
Some materials from certain decades have known defect histories.
PEX and copper compared
PEX
- Flexible and quick to install
- Resists freeze splitting
- Lower material cost
- Not for sunlight or outdoor use
Copper
- Rigid, long track record
- Higher material cost
- Joints are soldered or pressed
- Can corrode in aggressive water
Pipes failing in more than one place?
Call to talk through repiping. The plumber explains the options and gives a clear price before work starts.
Caldwell homes and when repiping is likely
The Census Bureau's 2020 to 2024 estimates show 22,378 housing units in Caldwell, with about 56 percent built in 2000 or later and about 29 percent built before 1980. The median year built is 2003.
That split means two different conversations. Homes built before 1980 may have galvanized steel or older copper that is reaching the end of its life, while newer homes more often need a spot repair, a pressure regulator or a manifold fix than a full repipe.
What changes the price of a repipe
Repiping is priced by the house and the access, so the plumber looks before quoting.
Ask whether the quote includes drywall patching and paint, since those are often priced separately.
Permits, code and your options as an owner
Idaho's Division of Occupational and Professional Licenses says a permit is required when plumbing work is performed, and that homeowners may permit work on their own primary or secondary residence. The state plumbing code is the 2015 Uniform Plumbing Code with Idaho amendments, and permits expire after 365 days.
The City of Caldwell's Building Safety Division takes plumbing permit applications through its online portal and schedules inspections. Same-day inspection requests are taken by 7:00 a.m., so ask the plumber when the inspection will be booked.
Before committing to a repipe, a leak detection visit can show whether the trouble is one failing run or the whole system, and homes in Middleton are served the same way.
Repiping follows the 2015 Uniform Plumbing Code (UPC) with Idaho amendments, and the finished system is pressure tested and inspected.
Source: Idaho DOPL Plumbing Bureau FAQ and the City of Caldwell Building Safety Division
Living in the house during a repipe
A whole-house repipe commonly takes a few days, depending on the size of the house. Water is shut off for part of each day, and the plumber tells you when. Plan to have drinking water and a place to wash up for those hours.
Furniture along exterior walls and under attic hatches should be moved before the visit. The plumber protects floors and cleans up each day.
How a repipe runs
Walk the house
The plumber looks at the old pipe, the layout and the water heater connections.
Plan and quote
You receive a route, a material choice and a clear price.
Run new lines
New pipe is installed fixture by fixture, with the old line removed or capped.
Test and inspect
The system is pressure tested and inspected, then the walls are patched.
Repiping questions in Caldwell
Galvanized pipe is gray, magnetic and threaded at the joints. A magnet or a scratch with a coin tells the plumber quickly.
If the cause is corroded supply pipe, yes. If the cause is the city main, a regulator or a fixture, repiping will not help.
PEX is widely used for home supply plumbing. The plumber uses fittings made for the pipe, follows the manufacturer's rules and the adopted plumbing code, and has the work inspected.
Some access cuts are needed, but modern methods keep them small. Open attics and crawl spaces reduce wall work.
Yes. A bathroom group or a single run can be replaced when the rest of the pipe is sound.
Call the 24/7 line. See burst pipe repair for what to do in the first minutes.