There is a point where fixing individual leaks stops being maintenance and starts being a subscription. If a plumber has been to your house three times in two years for pinhole leaks in different places, the pipe is not failing at those three points. It is failing everywhere, and you happened to notice at those three points.
Repiping means replacing the supply lines that carry water through the house. It is disruptive, it is not cheap, and for some houses it is the difference between a predictable expense and an indefinite series of unpredictable ones.
The Pipe Materials That Prompt It
Polybutylene, a gray, blue, or black flexible plastic pipe installed roughly from the late 1970s into the mid 1990s, is the clearest case. It degrades from the inside through contact with chlorinated water and can fail without visible warning. It is no longer accepted under current codes. If your house is from that era and you find gray plastic supply lines, get an opinion.
Galvanized steel, common in houses built before the 1960s, corrodes internally. The zinc coating wears away, the steel underneath rusts, and the interior diameter narrows until pressure drops noticeably. Discolored water at first draw is a common symptom. Repairs on galvanized systems tend to trigger the next repair fairly quickly, because disturbing one section stresses the adjacent ones.
Lead supply piping is a health matter rather than a performance one and should be addressed on that basis. Note that lead service lines, the section running from the street to the house, are a separate question from interior piping and are being addressed by utilities on their own timeline under federal rules.
Copper is durable and often outlasts the people who installed it, but copper systems with aggressive water chemistry or high velocity flow can develop recurring pinhole leaks. Recurring pinholes in copper, plural and in different locations, is a system signal.
What It Costs
Whole house repipes commonly land somewhere in the $4,000 to $15,000 range, with larger, multi story, or hard to access homes running higher. Cost varies widely by region, by house size and number of bathrooms, and above all by access.
Access is the dominant variable. The same length of pipe in an open basement or a crawl space costs a fraction of what it costs behind tiled walls in a slab foundation house. Ask specifically how the plumber intends to route the new lines and how many walls or ceilings need to be opened.
Material choice matters less than most homeowners expect. PEX is flexible, can often be threaded through existing cavities with fewer openings, and is generally less expensive to install. Copper costs more in both material and labor and is preferred by some homeowners and some local codes. Ask each bidder to price the option they recommend and explain why.
What the Quote Should Cover
A repipe quote that is only a number is not comparable to anything. Ask for the following in writing, which is the same principle described in what a written scope of work should cover.
- Which lines are included, meaning hot and cold, and whether the main from the meter is part of it
- The pipe material and fitting system
- How many access openings are expected and where
- Whether drywall repair, texture, and paint are included, because this is the single most common gap between two quotes that look similar
- Fixture shutoff valves, whether new ones are included
- Permit and inspection
- How long water will be shut off and whether you can stay in the house
- Warranty terms on labor and on materials
Drywall restoration deserves emphasis. One plumber may quote the plumbing only and leave you with open walls. Another may include patching but not texture matching or paint. That difference can be thousands of dollars and it is invisible if you only compare the headline price. This is exactly the category of surprise covered in budgeting for the parts of a project you cannot see.
Partial Repipes
A full repipe is not always the answer. Replacing only the accessible horizontal runs, or only the hot water lines, or only one problem branch is sometimes a reasonable middle path, particularly in a house you do not plan to keep long.
The risk is obvious. You are betting that the sections you leave in place will hold. On polybutylene that is a poor bet. On copper with isolated damage from a specific cause, such as a section that runs against a heat source, it can be a sound one. Ask the plumber to say plainly which category your house falls into.
Timing and Living Through It
A typical whole house repipe runs a few days to about a week, with water off for portions of it. Many households stay in the house. Plumbers can often restore service at the end of each day, but confirm that rather than assuming it.
If you are already planning other work, this is a project worth sequencing deliberately. Repiping before a bathroom or kitchen remodel means the walls are open anyway and the restoration cost gets absorbed into work you were doing regardless. Sequencing multiple home projects in one year covers how to order that.
Getting Comparable Bids
Repiping is licensed work in essentially every jurisdiction because it involves joining new pipe to the potable supply. Confirm the license and the insurance before anything else, using verifying a contractor's license, insurance, and references.
Then get three quotes and hold them to the same scope. If one is dramatically lower, the usual explanations are that it excludes drywall restoration, excludes the permit, covers fewer lines, or assumes access that does not exist. Ask. A plumber who can explain exactly why their number differs from another one is telling you something useful either way.
If you want quotes for repiping or pipe repair, tell us about your home and we will connect you with plumbers serving your area. It is free to use, with no obligation to hire.