Repiping a House in the Lower Mainland

What Is a Whole House Repipe, and Is It Really Necessary?

Repiping a home means replacing the entire water supply syste, the network of hot and cold water pipes that run through your walls, floors, and ceilings to deliver water to every tap, shower, toilet, and appliance in the house. It doesn't include the drainage system (the pipes that carry water away from fixtures) those are a separate conversation.

A whole house repipe is not a patch job. It's not fixing the one leaky joint under the bathroom sink. It's a full replacement of the pipe network that was originally installed when your home was built, and it's typically recommended when that network is at or past the end of its useful life, either because of age, material failure, or a combination of both.

Is it always necessary? No, and any plumber worth their licence will tell you the same. Sometimes the right answer is a targeted repair. But there are situations where continuing to patch an aging system costs more, in time, money, and stress, than simply replacing it. Knowing the difference is what this guide is for.

The Poly-B Problem: Why So Many Lower Mainland Homes Need Repiping Right Now

If you own a home built anywhere between 1978 and 1995 in Metro Vancouver, Burnaby, Richmond, Surrey, Coquitlam, Langley, or anywhere else in the Lower Mainland, there's a real possibility your home was plumbed with polybutylene pipe, known in the industry as Poly-B.

Polybutylene was widely adopted across North America during that period because it was cheap, easy to work with, and considered a reasonable alternative to copper. Builders loved it. It went into hundreds of thousands of homes in BC alone. And for years, it seemed to work just fine.

The problem is that Poly-B reacts poorly to chlorine, and the Lower Mainland's municipal water supply, like most treated water systems, contains chlorine. Over time, chlorinated water causes the interior of the pipe to degrade, become brittle, and develop micro-fractures. These fractures eventually become leaks. What makes this especially difficult is that the degradation is usually invisible, it's happening inside walls and under floors, where you can't see it until water starts appearing somewhere it shouldn't.

This is why Poly-B replacement has become one of the most common jobs we complete across the Lower Mainland. It's not a scare tactic. It's the reality of a specific pipe material that was installed in a specific era, aging in a specific way. If your home was built in that window, it's worth finding out what you have.

How to Identify Poly-B Pipe

Poly-B is typically grey, flexible plastic tubing, though it can also appear in blue or black. If you can access your utility room, basement, or crawl space, look at the pipes coming off your hot water tank or running along the joists. Grey plastic? There's a good chance it's Poly-B. The fittings are another tell, Poly-B was commonly joined with aluminium or copper crimp fittings, often with a distinctive grey or blue plastic body.

If you're not sure, don't guess. Call us and we'll come and take a look. An assessment costs you nothing but a phone call.

Poly-B and Home Insurance in BC

This is where things get practical and sometimes urgent. A growing number of insurance providers in British Columbia are declining to insure homes with Poly-B plumbing, or are attaching conditions, exclusions, or premium increases to policies that cover them. Some homeowners have received renewal notices stating that continued coverage depends on the Poly-B being replaced within a defined timeframe.

If you're selling, the situation becomes even more pointed. Buyers and their home inspectors know what Poly-B is, and a disclosure flagging the pipe material can complicate a sale or affect your sale price. Completing the Poly-B replacement before listing removes the issue entirely and is often one of the more strategic pre-sale investments a seller can make.

Other Reasons You Might Need to Repipe Your Home

Poly-B is the most common scenario we encounter, but it's far from the only one. Here are the other situations where a home repipe is likely the right call:

Galvanized Steel Pipes

Homes built before the late 1960s were often plumbed with galvanized steel, steel pipe coated with a layer of zinc to resist corrosion. Over time, the zinc coating breaks down and the steel beneath begins to corrode from the inside out. Corroded galvanized pipe restricts water flow, discolours drinking water (that rusty or brownish tinge at the tap), and eventually fails structurally.

If you're in an older Vancouver, Burnaby, or New Westminster home and you're getting discoloured water or noticeably low pressure at the taps, galvanized pipes are a likely culprit. By the time the symptoms are obvious, the pipe is usually well past its service life.

Aging Copper Pipe

Copper is an excellent pipe material, durable, long-lasting, and resistant to bacteria. But it isn't immortal. Copper pipe from the 1950s and 1960s was often installed with thinner walls than modern standards, and decades of water chemistry, flux residue from original soldering, and acidic water conditions can cause pinhole leaks to develop across the system.

If you're finding pinhole leaks in one place and then another, and then another, the pipe is telling you something. Individual repairs become a game of whack-a-mole. At that point, a full repipe is more economical than continuing to chase leaks one at a time.

Recurring Leaks and Constant Repairs

This is perhaps the simplest indicator of all. If you've called a plumber more than two or three times in recent years for leaks, in different locations, on different pipes, and each repair provides only temporary relief, you're looking at a system that is failing broadly, not failing in one spot. The math usually works out clearly: add up what you've spent on repairs over the past two or three years, and compare it to a repipe estimate. Many homeowners are surprised by how close those numbers are.

Pre-Sale or Pre-Purchase Planning

A repipe before selling your home removes one of the most common red flags that buyers and their inspectors look for. It also gives you a marketing point: a home with a fully documented, permitted repipe in recent years is a selling point, not a question mark.

On the buying side, if you're purchasing a home with older plumbing or known Poly-B, it's worth factoring the repipe into your financial planning early. It's not an emergency, but it should be on the list.

Renovation Work

If you're already opening walls for a kitchen or bathroom renovation, repiping at the same time is often a logical decision. The access is there, the disruption is already happening, and the incremental cost of running new pipe while the walls are open is considerably lower than doing a standalone repipe later. Good tradespeople will flag this opportunity when it exists.

Copper vs. PEX: Understanding Your Options

When you repipe a home in BC, you have two primary material choices: copper and PEX (cross-linked polyethylene). Both are approved under the BC Plumbing Code. Both are long-lasting and reliable. But they suit different situations, and the right choice depends on factors specific to your home, your budget, and your preferences.

Copper

Copper has been used in residential plumbing for over a century, and there's a reason it's still around. It's rigid, durable, resistant to bacteria, and has an expected lifespan of 50 years or more when properly installed. It handles heat well, doesn't expand and contract dramatically with temperature changes, and is fully recyclable.

The trade-offs are cost and installation complexity. Copper is more expensive than PEX, both the material itself and the labour involved in installing it. Joints are typically soldered (sweated), which requires a skilled hand and adds time to the job. In homes where access is difficult, the rigidity of copper pipe can also make routing more challenging.

PEX

PEX has become increasingly common in residential repiping over the past two decades, and for good reason. It's flexible, which makes it significantly easier to route through walls and around obstacles without as many fittings. It's also more resistant to freeze damage than copper, the pipe can expand slightly without cracking, which matters in exposed areas of a home.

PEX is generally less expensive than copper, both in material cost and installation time. It uses mechanical connections rather than solder joints, which reduces the risk of flux-related corrosion and simplifies future repairs if they're ever needed.

The main consideration with PEX is that it's a newer material in relative terms, and some homeowners, particularly in higher-end markets, have a preference for copper. Insurance companies generally treat both materials the same. Building codes in BC accept both.

Which Should You Choose?

We don't push homeowners in one direction before we've had a conversation with them. The right answer depends on your home's layout, your budget, your water quality, and your long-term plans for the property. When you call us for an estimate, we'll walk through both options clearly and give you our honest read on what makes sense for your specific situation.

What the Repiping Process Actually Looks Like

One of the biggest sources of anxiety for homeowners considering a repipe is not knowing what's going to happen to their house. The word "repipe" conjures images of walls torn open, weeks of disruption, and living in a construction zone. The reality is considerably less dramatic, here's what actually happens.

Step 1: Free Estimate and Assessment

Before anything else, we come to your home, assess the existing plumbing, discuss your options, and provide a written estimate. This is free and comes with no obligation. We'll let you know whether a full repipe is warranted, or whether a more targeted approach might serve you better. That honest assessment is how we've built a reputation across the Lower Mainland over three decades, we don't recommend work that isn't needed.

Step 2: Permits

In virtually every Lower Mainland municipality, Vancouver, Burnaby, Surrey, Coquitlam, Langley, Richmond, and the rest, a building permit is required for a full home repipe. We handle the permit application on your behalf. This is not optional and not a bureaucratic inconvenience: a permitted repipe is documented, inspected, and on record. That protects you when you eventually sell.

Step 3: The Repiping Work

Our team typically begins by installing the new pipe network alongside the existing system. Where walls or ceilings need to be opened, we work carefully and in a targeted way, this isn't demolition, it's surgical. Access holes are made where they need to be and nowhere else.

Homes with a crawl space have a natural advantage here: we can often run new pipe through the crawl space to reach multiple areas of the home, which minimizes the number of holes that need to be opened in finished walls. Slab foundation homes require more access points, which adds some time and material cost, something we account for clearly in the estimate.

As part of every repipe, we install emergency shutoff valves throughout the home. These give you the ability to isolate any section of your plumbing independently, which is genuinely useful in an emergency and a feature older homes rarely have.

Step 4: Changeover and Drywall Repair

The only time you'll be completely without water is during the final changeover from old system to new, typically a matter of hours rather than days. Once the new system is operational, we patch and repair all drywall and stucco that was opened during the work. You won't be left with holes in your walls.

Step 5: Inspection

Once the work is complete, the local building authority inspects the new plumbing. This is standard for permitted work and a straightforward step for a properly done repipe. The inspection sign-off goes on record and closes out the permit.

How Long Does a Repipe Take?

Most whole house repipes take between two and five days, depending on the size of the home and the complexity of the layout. A smaller home with a crawl space can often be completed in two to three days. A larger home on a slab foundation with multiple bathrooms and floors may take closer to a week. We'll give you a realistic timeline in the estimate.

How Much Does It Cost to Repipe a House in the Lower Mainland?

There's no single number that applies to every home, and anyone who quotes you a firm price without seeing your home first is guessing. That said, homeowners reasonably want a ballpark before they pick up the phone, so here's an honest range:

In the Vancouver and Lower Mainland market, a whole house repipe typically costs somewhere between $6,000 and $25,000. The wide range reflects the genuine variability in project scope. The key factors that affect the final cost are:

• Size of the home: more square footage means more pipe, more fittings, and more time
• Number of bathrooms and fixtures: each additional bathroom adds material and labour
• Pipe material chosen: copper costs more than PEX, both in material and installation time
• Foundation type: crawl space access is faster and cheaper than slab
• Condition and layout of existing walls: some homes are easier to work in than others
• Permit fees: these vary by municipality but are a fixed component of every job

The best thing we can do for you is give you an accurate number for your home specifically, and that starts with a free estimate.

Why a Permitted Repipe Matters More Than You Think

Some homeowners ask whether permits are really necessary. They are, and here's why it matters beyond simple legal compliance.

A permitted repipe creates an official record that the work was done, what was installed, and that it was inspected and passed by the local authority. When you sell your home, that record is available. Buyers and their solicitors look for it. A repipe with no permit history raises questions; one with a clean permit and inspection record is a straightforward asset.

There's also the insurance dimension. If a plumbing failure causes water damage after an unpermitted repipe, your insurance company may have grounds to deny the claim. That's a risk not worth taking when the permit process exists specifically to prevent it.

Choosing the Right Plumber for a Repipe

A whole house repipe is one of the most significant plumbing projects a homeowner will ever undertake. It's worth being deliberate about who you hire. Here's what to look for:

A licensed master plumber: BC requires plumbing work to be performed by licensed tradespeople, and a repipe specifically benefits from the involvement of a master plumber who has the experience and code knowledge to manage the full scope of the job.

A contractor who handles permits: If a plumber suggests skipping the permit to save time or money, walk away. A legitimate repipe contractor handles permits as a standard part of the job.

Full-service capability: Repiping involves not just plumbing but wall repair. A contractor who manages the full scope — permits, plumbing, drywall repair, and inspection — saves you the hassle of coordinating multiple trades.

A clear, written estimate: Before any work begins, you should have a written estimate that itemizes the scope of work, materials, and cost. No surprises.

References and reputation: Look for a company with a documented history of repipe work in your area. Reviews, BBB standing, and years in business are all useful signals.

Serving the Lower Mainland Since 1993

KC's Plumbing & Heating has been completing repipes across Metro Vancouver and the surrounding region for over thirty years. We've worked in homes from East Vancouver to South Surrey, Richmond to Maple Ridge, older character homes with galvanized pipes, 1980s builds with Poly-B systems, and everything in between. Our owner is a licensed master plumber, and every job we take on is handled by qualified tradespeople who take the work seriously.

We know a repipe is a significant decision. We also know that for many homeowners, the anxiety of not knowing, what's in the walls, how urgent it is, what it's going to cost, is worse than the job itself. Our goal on every estimate is to give you a clear, honest picture so you can make a good decision, whatever that turns out to be.

If your home has Poly-B, aging galvanized pipe, or a history of recurring leaks, or if you're simply not sure what you have and want a professional opinion, give us a call. We'll come and take a look, give you a straight answer, and take it from there.

KC's Plumbing & Heating
📞 604-873-3753
Open 24 hours for emergencies

Serving Vancouver, Burnaby, Richmond, Surrey, Langley, Coquitlam, Port Coquitlam, Port Moody, Maple Ridge, Pitt Meadows, North Vancouver, West Vancouver, New Westminster, Delta, and White Rock.