Repipe Specialists: What Sets Them Apart
By Ramin Shahbaziasl, Owner, Eastside Repipe and Plumbing · Last updated September 16, 2025
Any licensed plumber can replace a section of pipe. Repiping a whole house is a different job: routing, sizing, access planning, phasing so the household keeps water, pressure testing, permit, inspection, and restoration.
That difference is what "specialist" is supposed to mean. Here is what it actually looks like in practice, and what to check before hiring anyone for a job this size.
Key Points
Repiping replaces the supply system rather than patching individual failures
Specialization shows up in planning and sequencing, not in tools alone
Material choice should follow the house, not a preference
Verify licence, bond, and insurance yourself before comparing quotes
Most whole-house repipes are two to five days of plumbing, plus restoration
What a Specialist Does Differently
Diagnoses before quoting. A section of pipe cut out and opened up tells you the remaining wall thickness and how much of the bore is left. That is the difference between quoting from evidence and quoting from the year the house was built.
Plan the routing once. Repiping is a sequencing problem as much as a plumbing one. Where the access points go, which walls open, what order the zones run in, and how the household keeps water overnight. A crew that has done hundreds of these plans it in one pass.
Minimises what gets opened. Camera inspection and careful routing mean fewer access holes, which means less drywall, less patching, and a shorter total job.
Tests properly. Every joint is pressure tested before anything closes up. On a system buried behind drywall, this is the only chance to find a problem cheaply.
When a House Needs Repiping
Brown or rusty water, especially after the house has sat unused
Pressure that has dropped across multiple fixtures, not just one
Repeated leaks. A second pinhole in a year means the rest of the run is the same age
Galvanized supply lines, common in homes built before the 1970s
Musty smells or staining near walls where pipe runs
If you patch one leak and another appears months later, you are managing a system at end of life rather than fixing faults. Our guide to rusted pipe repair covers where that line falls, and detecting a hidden water leak covers the meter test you can run yourself.
Copper or PEX
Copper. Long track record, rigid, and every joint is soldered. Higher material and labour cost. Some homeowners prefer it where pipe is exposed.
PEX. Flexible, corrosion-resistant, and routes through existing framing with far less demolition. Faster to install and lower cost, which is why it suits most homes.
On freezing: PEX handles a freeze better than rigid pipe because it can expand somewhat, but it is not freeze-proof, and it will still split under sustained cold. Insulation matters either way, and our winterizing guide covers it.
The right choice depends on your home's layout, access, water chemistry, and how long you plan to stay. Our comparison of PEX and copper covers the tradeoffs in detail.
What the Work Involves
Inspect. Existing material, condition, routing, and access established, including cutting a section to see the interior
Plan. Routing, access points, zoning, and the schedule for keeping water on
Permit. Repiping is permitted work, and the contractor should pull it in their own name
Replace. Old lines out, new lines in, generally zone by zone
Test. Pressure tested before anything closes up
Inspection and restoration. Signed off by the jurisdiction, then walls patched and the site cleaned
Most whole-house repipes are two to five days of plumbing depending on size and access, with water restored at the end of each working day. Drywall repair and paint follow and usually take longer on the calendar than the plumbing did.
There will be dust, and there will be access holes. A good crew protects the space and patches properly, which is different from you not noticing anything happened.
What You Get From It
Flow restored. Old galvanized pipe narrows internally as corrosion builds. New pipe returns the system to its designed capacity, which is why showers stop weakening when someone runs a tap elsewhere.
Clean water. Discoloration from corroding supply lines stops because the source of it is gone.
No more recurring leaks. You stop paying for the same failure in different places.
A documented, permitted system that holds up at resale, where galvanised pipe is a known deduction during inspection.
Why This Is Not a DIY Job
Repiping is permitted work involving code-specified materials, pressure testing, and inspection. Beyond the legal position, the practical one: mistakes are invisible when you finish and expensive when they surface, because they surface inside finished construction.
There is also no coverage. Damage you cause during unpermitted work is generally your own problem, and unpermitted plumbing gets found during a home sale.
What to Check Before Hiring
Verify the license yourself. Washington requires plumbing work to be performed by certified plumbers employed by a licensed contractor. The state Department of Labor and Industries lookup returns license status, bond, insurance, and any infractions in about a minute.
Ask for certificates of insurance. Our guide to hiring an insured repiping contractor covers what that coverage protects you from.
Ask whether they will show you the pipe. A contractor willing to cut a section and let you see inside is quoting from evidence.
Get itemized pricing. Labour, materials, permit, and restoration separately, so bids are comparable.
Ask what the warranty covers, in years and in writing.
What It Costs
It depends on house size, number of bathrooms, whether it is single or two-storey, crawlspace or slab, how much drywall comes out and goes back, and the material. Access is usually a bigger variable than material choice.
We quote in writing after walking the house, itemized so it can be compared against another bid. Our plumber cost guide covers typical local rates, so you have a reference beforehand.
Frequently Asked Questions
How long does a repipe take?
Two to five days of plumbing for most homes, depending on size and access. Water is normally restored at the end of each working day. Drywall repair and paint follow afterwards.
Do I need to move out?
No. Most homeowners stay in the house throughout. The work is zoned so you keep water access for most of each day.
What is the difference between a plumber and a repipe specialist?
A plumber repairs faults. A repipe specialist replaces systems, which is a planning and sequencing job as much as a plumbing one. The difference shows up in how few walls get opened and how well the schedule holds.
Copper or PEX?
PEX suits most homes on cost, speed, and reduced demolition. Copper has a longer track record and higher cost. It is a technical decision based on your house rather than a budget one.
Will repiping improve my water pressure?
If the pressure loss came from internal corrosion narrowing the lines, yes, flow returns to normal. If the cause is supply-side, repiping will not change it, which is why the inspection comes first.
Do I need a permit?
Yes. Repiping is permitted work in Washington, and the contractor should pull it in their own name. Unpermitted plumbing surfaces during a home sale.
Get a Written Quote
If you are seeing brown water, falling pressure, or a second leak in the same year, the next useful step is an inspection that tells you how much of the system is affected.
Request a free quote or call 425-331-2011. We will inspect the system, show you the inside of your own pipe, and quote in writing, including permit and restoration.
See our repiping services for the full scope. We serve Bellevue, Redmond, Kirkland, Bothell, Renton, Issaquah, Sammamish, Seattle, and the wider Eastside service area.
