Galvanized pipe replacement
The most common reason for a repipe in older Idaho housing, in detail.
Learn morePipes and repiping
Whole home repiping: replacing the pipe instead of chasing it
There is a point where patching stops being the cheaper option. A house on its third pinhole leak, or running brown water through corroded galvanized, is telling you the material has reached the end rather than that a fitting failed.
Lines are open right now:
(833) 472-2088
Third leak in a year? Get a repipe scope in writing.
Repair count decides
Three leaks in a year is a material problem, not luck.
PEX or copper
Both are code-approved. The choice is situational.
Lived in throughout
Most repipes are staged so you keep a working bathroom.
Permitted and inspected
Rough-in inspection before anything gets closed up.
The threshold
Five signals that patching has run out
Repeat pinhole leaks. Copper that has started pinholing does not stop. The first leak is bad luck, the second is a pattern, and by the third the useful question is not where the next one will be but what the whole system is worth. Each individual repair is cheap; the drywall, the paint and the water damage are not.
Discoloured water and falling volume. Rust-coloured water on first draw, or a shower that fades when another fixture opens, is the signature of galvanized steel closing up from the inside. Pressure at the meter is fine. The pipe is the restriction, and no amount of pressure will push water through a half-inch line that has a quarter-inch of bore left.
Polybutylene anywhere in the house. Grey plastic supply, common in construction from the late 1970s into the mid 1990s, fails at fittings and along the pipe with little warning. Where we find it we say so plainly: it is a replacement conversation, not a repair one, and insurers frequently take an interest.
A remodel that opens the walls anyway. The cheapest repipe is the one done while a kitchen or bathroom is already stripped. If old pipe is going to be replaced within a decade, doing it while access is free is straightforwardly better economics.
A house you have just bought. Before the floors go down and the cabinets go in. Repiping an empty house is faster, cheaper and less disruptive than repiping a furnished one.
What a repipe does not fix
Repiping replaces the water distribution inside the building. It does not change the buried service line from the meter, the drain and waste piping, or the water heater, those are separate jobs, and it is worth knowing which of them are also near end of life before you plan the work. A repipe with a failing service line still gives you poor volume.
Rusty water and no volume is galvanized, not pressure.
Materials
The four things we find in Idaho houses, and how each fails
Galvanized steel
Standard through the 1950s and still present in plenty of Idaho’s older housing, from Boise’s inner neighbourhoods to the older streets of Pocatello, Nampa and Coeur d’Alene. It corrodes internally, scaling inward until the bore is a fraction of its nominal size. Symptoms arrive as volume loss and rusty water rather than leaks, and the threads corrode first, which is why the leaks that do appear cluster at fittings.
Polybutylene
Grey or occasionally blue flexible plastic with crimped or plastic fittings, used from roughly 1978 into the mid 1990s. Failure modes include splitting at the fitting and brittle failure along the run, and they tend to arrive without a warning drip. It is not a code-approved repair material now.
Copper with pinholes
Copper is a good material that can still fail early, thin-wall tubing, aggressive water chemistry, high pressure, or velocity erosion where a line was undersized. Pinholes appear as small weeping spots, often on horizontal runs and near fittings, and they come in waves.
Early or poorly installed PEX
Modern PEX is excellent. Some early fittings and some installations were not, unsupported runs, exposure to sunlight during construction, or fittings recalled by their manufacturer. Occasionally a partial repipe is the right answer here rather than a whole-house one.
Alongside all of it we look at what the house was built with as a system: the size of the service line, the pressure at the entry point, whether a regulator exists and works, and whether the distribution was ever sized for the number of bathrooms now attached to it.
The choice
Two good answers, chosen for different reasons
PEX. Flexible cross-linked polyethylene, run either as a home-run manifold system or a trunk-and-branch layout. It bends around framing so fewer walls have to be opened, which is why a PEX repipe on a furnished house is usually faster and less destructive. It tolerates a freeze better than rigid pipe, not immune, but more likely to survive the ice than split. It does not corrode or scale, and it is quieter. It must be protected from direct sunlight, needs proper support and fittings, and rodents can damage it in an unsealed crawl space.
Copper. Rigid, long-proven, tolerant of high temperature, and unaffected by sunlight. Some owners want it for resale or because they simply prefer it. It costs more in both material and labour, needs a great deal more wall opened to run it, and in water chemistry that has already pinholed one copper system it is a fair question whether it is the right material for that house.
How the recommendation actually gets made. Occupied house with finished walls and a tight schedule leans PEX. Exposed basement or a gut remodel, or a strong owner preference, makes copper straightforward. What the previous copper did in that house matters. And where the water is hard, which is much of southern and eastern Idaho, softening or conditioning is worth discussing at the same time, because it affects the life of everything downstream. See water softener installation.
Both materials are approved under the plumbing code adopted in Idaho jurisdictions when installed to their listings, with proper support, protection at penetrations, and correct fittings. The work is permitted and inspected either way.
Ask what PEX would take in your house specifically.
Disruption
What the week actually looks like in an occupied house
How long. A single-storey house with a basement or crawl space is commonly two to four working days for the pipe, plus drywall repair. A two-storey house with finished ceilings, or a house with multiple bathrooms stacked awkwardly, runs longer. Slab-on-grade construction changes the approach entirely, since lines get rerouted overhead rather than through the floor.
Water off, but not all week. Repipes are staged. Water goes off during the hours when connections are being made and back on overnight in almost every case. A working bathroom is normally kept in service through the job, say up front which one matters most to you.
Access holes. This is the part people underestimate. Pipe reaches fixtures through walls and ceilings, so there will be openings: behind and beside fixtures, at the tops of walls, at ceiling penetrations between floors. A good crew makes fewer, neater holes in sensible places rather than many ragged ones.
Who patches them. Establish this before signing. Some repipe quotes include drywall patch and texture, some include patch but not paint, some leave the openings for your own contractor. All three are legitimate; only one of them matches what you assumed. Ask directly.
Furniture, storage and pets. Clear access to walls under sinks, to the laundry, to the water heater and to the crawl space hatch. Expect crew traffic through the house and plan for animals accordingly.
Inspection. The new pipe is pressure tested and inspected at rough-in, before anything is closed up. That inspection is your protection and it is a reason not to let anyone close walls early.
Scope and price
What moves the number, and what to include while walls are open
Fixture count, not square footage. Price tracks the number of fixtures and their distribution, three bathrooms spread across two floors is more pipe and more openings than a large single-storey with one bathroom and a kitchen.
Access. An open basement or a workable crawl space is the good case. Finished ceilings on both floors, plaster and lath, tile surrounds and slab construction each add labour.
Construction type. Crawl space, basement or slab changes the routing strategy and therefore the hours. Idaho has plenty of all three, plus older houses with additions that were plumbed by three different people across forty years.
Worth doing at the same time. Shut-off valves at every fixture, which older houses often lack entirely. A main shut-off that actually closes. Frost-proof hose bibs. Recirculation for a long run to a distant bathroom. A pressure regulator if the incoming pressure is high, see water pressure regulator. Replacing a water heater already near end of life while the connections are open, covered on water heater installation.
Freeze protection is not a detail here. This is Idaho: pipe in exterior walls, unheated crawl spaces, garages and vented attics is what freezes. A repipe is the one chance to reroute those runs into conditioned space, insulate what has to stay outside it, and stop buying a burst pipe every hard winter. Related: freeze protection and frozen pipe repair.
Old service line. If the buried supply from the meter is the same vintage as the pipe coming out of the walls, ask about it now rather than in two years. See main water line repair.
Remodel coming? Repipe while the walls are already open.
How it runs
From walkthrough to closed walls
A repipe is a small construction project and it should be run like one, with a written scope before anyone opens a wall.
1. Walkthrough and written scope
Every fixture identified, materials confirmed, pressure and volume tested at the entry point, routing planned and access holes agreed. You get a fixed scope that states who patches drywall and who paints.
2. Rough-in, staged for occupancy
New lines run and connected zone by zone with water restored each evening and a working bathroom kept in service. The system is pressure tested and inspected before anything is closed.
3. Close up and hand over
Openings patched to the agreed scope, fixtures reconnected, every valve labelled, lines flushed and aerators cleared of debris. You get shown where the shut-offs are and how the manifold is arranged.
Coverage
Repiping across Idaho housing stock
Repipes run statewide and the housing varies a great deal: pre-war galvanized in the older streets of Boise, Pocatello, Idaho Falls and Coeur d’Alene, polybutylene in eighties and early-nineties subdivisions across the Treasure Valley, and cabins and seasonal homes in the mountain valleys where freeze routing matters more than anything else.
Questions
Repiping questions
It is quoted per house because the drivers are fixture count, access and construction type rather than floor area. A single-storey house with a workable crawl space and one and a half bathrooms sits at the low end; a two-storey with finished ceilings, tile bathrooms and three bathrooms sits well above it.
Get the scope in writing and check three things in every quote: whether drywall patching is included, whether painting is included, and whether fixture shut-off valves are included. Those three account for most of the difference between quotes that look far apart.
Both are code-approved and both last. PEX is faster to install, needs fewer walls opened, handles a freeze better and costs less. Copper is rigid, proven, unaffected by sunlight and preferred by some owners for resale.
For an occupied, finished house PEX is usually the practical recommendation. For an exposed basement, a gut remodel or a strong preference, copper is straightforward. Where the existing copper has pinholed repeatedly, that house’s water chemistry is a real argument for PEX.
Almost never. Repipes are staged so water is restored each evening and a working bathroom stays in service. Expect crew in the house during working hours, noise, and dust from wall openings.
People with a home office or small children sometimes choose to be elsewhere during the noisiest two days. It is a preference, not a requirement.
Whoever your contract says. Some repipe quotes include patch, texture and paint; some include patch only; some leave the openings. All are common and none is wrong, but the difference is significant money.
Ask for it in writing before work starts. A repipe finished to bare patched drywall in a house you thought would be repainted is a bad surprise.
Two to four working days of plumbing for a typical single-storey with accessible below-floor space. Four to seven for a two-storey with finished ceilings and multiple bathrooms. Drywall repair and paint add days on top and are often scheduled separately.
Slab-on-grade houses take longer because lines have to be rerouted overhead rather than replaced in place.
If the restriction is corroded galvanized distribution, yes, dramatically, and it is the most satisfying result in this trade. If the restriction is the buried service line, a failed pressure regulator or the utility supply pressure, then no.
That is why pressure and volume get tested at the entry point before the quote. Repiping the inside of a house fed by a strangled service line is money spent on the wrong half of the system.
Yes to both in Idaho jurisdictions. Repiping is permitted work and there is a rough-in inspection of the new system, pressure tested, before walls are closed.
Do not accept a repipe done without a permit. Beyond the code compliance question, closed walls with no inspection record is a problem the next time you sell the house.
It has a poor field record. Failures happen at fittings and in the pipe wall, frequently without a warning leak, and the material is no longer code-approved for repair or new work.
Where we find it in an Idaho house we say clearly that it should be planned out rather than patched. Insurance carriers sometimes ask about it too, which occasionally shapes the timing.
Grey polybutylene supply lines deserve a conversation now.
Replace it once, properly
A written scope, staged so you keep water, inspected before the walls close. Call to arrange a walkthrough anywhere in Idaho.
(833) 472-2088