Plumbing services
Whole-house repiping: a pattern, not one leak
How to tell a system failure from a local one, how each supply material fails, and what a repipe quote must spell out.
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Written by HyrePlumber Research Desk Primary-source research and fact checking
The short answer
A whole-house repipe is justified by a pattern of failures across the system, or by a supply material known to fail, such as polybutylene or badly corroded galvanized steel.
One pinhole in otherwise sound copper is a repair. Leaks in different rooms, rusty cold water at several taps or pressure falling house-wide are the pattern that starts the repipe conversation.
What should you know before you agree to a repipe?
Leaks in different rooms over months are a system telling you something.
Confirmed polybutylene and heavily corroded galvanized steel are replacement cases. Sound copper is not.
“Repair included” and “finished and painted” are different scopes. Ask which one you are buying.
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What are the signs a repipe is on the table?
No single sign is enough. What counts is how many are true at once, and whether they are spread across the house or sit at one fixture.
Several leaks within a year or two in different parts of the house, not one leak that keeps coming back in one place.
Brown water from the cold side at more than one fixture, worst first thing in the morning.
A slow drop at every tap, not one, points at the pipe interior rather than an aerator or a cartridge.
Flexible gray, blue or black supply pipe, which can carry a PB2110 stamp, at the water heater, under sinks or at the main shut-off.
Threaded gray steel pipe that a magnet sticks to.
Pinhole leaks that keep appearing on the same circuit, or a section a plumber has already repaired twice.
What should a plumber check before recommending a repipe?
The point of the assessment is to show whether the failures belong to the system or to one spot. A recommendation without these checks is a quote, not a finding.
At the water heater, the main shut-off, under sinks, in the crawlspace or basement and at the meter. Houses get repiped in pieces, so one spot proves nothing about the rest.
How many leaks, where, over what period, hot or cold side, and whether earlier repairs held.
High incoming pressure damages pipe and fittings, and a valve is a smaller job than a repipe.
What a removed galvanized nipple or old length looks like inside is direct evidence of its condition.
Hardness, and pH where known. Chemistry that damaged the old pipe acts on the new pipe too. The water hardness converter turns a utility report into plumbing units.
Pinholes on hot lines alone have different causes from system-wide failure, and can have a smaller answer.
An open attic, crawlspace or basement decides how much wall has to come out, which drives much of the cost.
The pipe from the street to the meter may be lead. Your water system’s public inventory can say, and replacing it is a different job from a repipe.
What does a repipe involve?
Running the pipe is the least disruptive part. Much of what you live through, and of what you pay for, is access and restoration.
Walk the house with the plumber as they mark each wall opening. Agree in writing which fixtures are included: hose bibs, the ice maker line, the laundry box and any detached building.
A partial repipe fits when the evidence is local, such as one leftover galvanized section. It does not fit when it only shrinks the quote, because you pay for access and patching twice. Ask what is left and what they expect of it.
Small cuts at each fixture wall and larger openings at junctions and the water heater. Fewer, square holes in flat wall are cheaper to patch than ragged ones near corners.
New lines go in while the old system stays live, then the house is switched over in one operation. Ask how long the water will be off, and on which days.
The new system is pressurized and held before anything is closed. Where a permit is required, the inspection happens with walls open. Nothing is patched until both have passed.
Settle this before you sign. “Drywall repair” can mean closed and taped. “Finished and painted” means floated, sanded, primed and painted. Ask which, whether texture is matched, and whether paint covers the patch or the whole wall.
Tile, stone, cabinet backs, stucco, insulation and flooring are outside a typical plumbing quote, as is anything found behind a wall. Get the exclusions listed.
How does each supply material fail?
What you have decides whether this is a repair or a replacement conversation. What you move to is a separate choice. The full identification guide is on pipe materials.
| Material | How it fails, and what it means |
|---|---|
| Polybutylene | Flexible gray, blue or black supply pipe installed in US homes from about the late 1970s to the mid-1990s. It has a record of failing at fittings without warning. A build year is not a diagnosis: confirm it by seeing the pipe in more than one place. |
| Galvanized steel | Zinc-coated steel with threaded joints. It corrodes from the inside, and the rust scale narrows the bore. Discolored water comes first, then falling flow, then leaks at the threads. An outside look understates the damage; a cut section shows it. |
| Copper with pinholes | Pinholes come from water chemistry, velocity, temperature or stray current, not age alone. One pinhole is a repair. Repeats mean the cause is still there, and new pipe in the same conditions can fail the same way. |
| PEX (new work) | Flexible cross-linked polyethylene run in long lengths, with fewer joints inside walls. Long runs can mean less wall opened. It is kept out of sunlight, and fitting systems differ between installers. |
| Copper (new work) | Rigid, long-established and unaffected by sunlight. It takes more joints and more wall access. If chemistry pinholed the old copper, fix the chemistry before you reinstall it. We do not pick a winner between PEX and copper. |
| What your code allows | Approved supply materials are set by the plumbing code your jurisdiction adopted (IPC or UPC) and its local amendments. Ask your building department. |
What belongs in the written repipe scope?
Once the walls are closed, none of this can be checked. Every line should be in the quote before work starts.
Every fixture connected, including hose bibs, laundry, ice maker and water heater connections.
PEX type or copper type, the diameters, and the fitting system used.
Home runs from a manifold, or a trunk and branches, and where the manifold sits.
New stops at each fixture, and whether the main shut-off is replaced.
The test pressure and hold time, done before any wall is closed.
Who pulls the permit, who pays the fee, and a commitment that nothing is closed before inspection.
Removed or abandoned in place, and how abandoned lines are capped.
Closed, finished or finished and painted, texture matched or not, patch or whole wall.
Tile, stone, cabinets, flooring, insulation, stucco and drains, named in writing.
The days and hours without water, and whether a bathroom stays live.
Drains are a separate system. A supply repipe does not touch them, so ask for that exclusion in writing. Drain trouble belongs with sewer line repair.
What moves the price of a repipe?
The pipe is a small part of the number. Access and restoration drive it, which is why two honest quotes for one house can be far apart.
| Factor | Why it changes the number |
|---|---|
| Fixtures and bathrooms | The pipe follows fixture connections, not floor area. A compact three-bathroom house can be a bigger job than a sprawling one-bathroom house. |
| Routing and access | An open attic or full basement means far less wall opened than a slab house with no attic. |
| Slab lines | Lines in or under a slab are abandoned in place and rerouted overhead, which moves where the holes land. |
| Stories | A second story adds vertical runs, more wall openings and ceilings opened below. |
| Material | PEX and copper differ in material and labor, and copper needs more openings for its joints. |
| Drywall scope | Closed, finished or painted, texture matched or not. A frequent reason two quotes differ for the same pipework. |
| Permit and inspection | Set by your jurisdiction. Ask whether the quote includes it. |
| Occupied or empty | Protecting floors, masking rooms and staging the work around a family takes time. |
HyrePlumber publishes no national average price for this work. Regional labor rates, access, pipe material and permit fees move it far enough that a single figure would mislead.
Ask to see the pipe in three places.
Before agreeing to a whole-house repipe, ask the plumber to show you the supply pipe at three points and name each one. If the recommendation rests on the year the house was built, you do not have a finding yet. Then get the drywall scope written as a sentence, not a word.
What to ask before you sign
Where did you look, and can you show me one of those places?
What rules out a run of bad luck at one fitting?
If partial, what is left and what do you expect of it?
Is there a working pressure-reducing valve?
What does my jurisdiction allow?
Closed, finished, or finished and painted? Texture matched?
Tile, stone, cabinets, flooring, insulation, stucco, drains.
On which days, and can we stay in the house?
What to have ready before a plumber visits
At the water heater, the main shut-off, under a sink and at the meter.
Dates, rooms, hot or cold side, and what was done each time.
Your utility’s annual water quality report (the Consumer Confidence Report) can list hardness and lead results.
Check your water system’s lead service line inventory, which EPA requires it to make public.
Decide the wall finish you expect before anyone quotes.
Where do repipe decisions go wrong?
A single failure at one fitting, in a system with no other history, is a repair. If the only evidence offered is the age of the house, that is not evidence about your pipe.
The install window overlaps other materials and varies by builder and region. It is identified by seeing the pipe in more than one place, not by a date or through a closed wall.
Closed and taped is a fair reading of that phrase, and it leaves you hiring a finisher and a painter afterward.
Access and patching are paid for again on the next section. A partial fits local evidence, not a quote comparison.
If chemistry, velocity or high pressure pinholed the old pipe, the same material in the same conditions can fail again.
One includes hose bibs, laundry and the ice maker; another stops at the bathrooms. Itemize the fixtures before comparing a number.
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Questions
How do I know if I need a repipe or just a repair?
Is polybutylene pipe always a problem?
PEX or copper: which is better?
Does a repipe replace my lead service line?
Can I stay in the house during a repipe?
Does a repipe include the drains?
Will a repipe fix my low water pressure?
How long does a whole-house repipe take?
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HyrePlumber Research Desk
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