The Technical Process
The Repiping Process: How the Work Actually Gets Done
Beyond the customer-facing steps, here's what the repiping process actually involves technically — routing methods, permits, and how the system gets verified before anything closes up.
A properly done repipe is inspected and pressure-tested before any wall closes — skipping that step is how bad work hides.
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See the technical process applied to your own home — request a referral.
We’ll email you to connect you with a licensed plumbing contractor, who confirms your Poly B on site and gives you a firm price — pipe and walls, one number.
Firm, written price before any work begins — no surprise billing, ever.
Routing the New Lines
How New Pipe Actually Gets Routed Through Your Home
New PEX lines are typically run through the attic where possible, dropping down through walls to reach fixtures, rather than routed entirely through finished living space walls when there's an accessible route above. This minimizes how much drywall needs to be opened compared to a less planned approach.
Where attic routing isn't practical — a slab-on-grade home, or fixtures far from any attic access — lines run through walls directly, which is where careful planning of access points matters most to keep the drywall-restoration scope reasonable.
Permits and Code
Why Permits and Code Compliance Matter
Whole-home repiping is licensed trade work with real permit requirements in most jurisdictions — not paperwork for its own sake, but a system that confirms the work meets code (proper pipe sizing, support spacing, backflow prevention where required) before it's buried behind drywall where it can't easily be checked again.
Skipping this step is how substandard work goes unnoticed until it causes a problem years later. We handle permitting as a standard part of the process, not an optional add-on.
Verifying the Work
Pressure-Testing and Inspection Before Anything Closes Up
Every new line is pressure-tested before drywall goes back up — the system is charged and monitored to confirm every joint and fitting holds under pressure, catching any installation issue while it's still accessible rather than after the wall is closed.
This step is what separates a properly verified repipe from one where problems simply haven't shown up yet. See our customer-facing process page for how this fits into the overall project timeline from your perspective.
The Technical Sequence
The Technical Sequence, Start to Finish
The order the physical work actually happens in.
Through attic and wall access points, minimizing unnecessary drywall openings.
Confirming the installation meets local code requirements.
Verified sound before any drywall restoration begins.
Getting Started
See This Process Applied to Your Home
A referral to a licensed contractor lets us map out the actual routing plan for your specific layout before any work begins, so you know what to expect technically, not just administratively.
After the Technical Work
What Happens After the Plumbing Is Verified
Once every line has passed pressure testing and inspection, the project shifts to our in-house drywall team, who patch, tape, mud and sand each access point through multiple coats to a smooth, paint-ready finish — a separate skill set from the plumbing work, handled by dedicated trade rather than the plumber doing double duty.
See our preparing your home page and what to expect during repiping page for the homeowner-facing side of how this all comes together day to day.
This handoff between plumbing and drywall is also why the two trades being under one roof matters practically, not just administratively — our drywall team already knows exactly what was done, where, and why, without needing a separate briefing or site visit to get up to speed on someone else's work.
Common Questions
Frequently Asked Questions
How does new pipe get routed through my house?
Typically through the attic where possible, dropping down through walls to fixtures — minimizing how much drywall needs opening compared to routing entirely through wall cavities. Skipping straight to drywall without this verification step is exactly how installation problems go unnoticed until they cause damage months or years later — the extra time spent testing upfront is what prevents that outcome.
Is a permit required for whole-home repiping?
In most jurisdictions, yes — it's licensed trade work with real code requirements, which we handle as a standard part of the process.
How do you verify the new plumbing is installed correctly?
Every new line is pressure-tested before drywall closes anything up, confirming every joint and fitting holds under pressure. We're glad to answer follow-up questions about any of these steps if you want more specifics for your own understanding.
What happens if a pressure test finds a problem?
It gets corrected before any drywall restoration begins — that's the whole point of testing before closing anything up. We're glad to go into more depth on any part of it.
Does routing through the attic always work?
Not always — homes with slab foundations or fixtures far from attic access may need direct wall routing instead, which we plan for during the assessment. We're glad to walk through any of these technical steps in more detail if you're the kind of homeowner who wants to understand exactly what's happening, not just that it's happening. We're glad to walk through it in as much detail as you'd like during your assessment, at whatever level of technical depth is actually useful to you.
Does a repipe need a permit, and is DIY repiping legal?
Does a repipe need a permit - in most Canadian municipalities yes, and a plumbing permit for repipe work is what brings a repipe inspection with it. Is DIY repiping legal is the related question: potable water work is generally restricted to licensed trades, and unpermitted work is exactly what an insurer points at after a loss. A repipe pressure test before the walls close is the other half of that paper trail.
In Short
The Repiping Process — The Short Version
The technical repiping process involves routing new PEX lines through attic and wall access points, securing proper permits and code compliance, and pressure-testing every line before any drywall restoration begins. It's a verified, inspected process, not just running new pipe and hoping it holds. Understanding the technical sequence — routing, permitting, pressure-testing, then restoration — is useful context, but the practical takeaway for most homeowners is simpler: a properly run process protects you from problems you'd never see once the walls are closed, which is exactly why each of those steps matters. We take that step seriously on every single job. That care is part of every job we do.
Get Started
See the Process Mapped to Your Home
A referral to a licensed contractor lets us plan the actual routing before work begins.
Get My Poly B Repair Quote