Poly-B (polybutylene) water piping was widely installed in Canadian homes from the late 1970s to the mid-1990s and is prone to sudden failure at fittings. Many insurers ask about Poly-B and may raise premiums, limit water damage coverage or decline coverage until it is replaced. Nanaimo homeowners can identify it as flexible grey pipe, often stamped PB2110, and replace it with PEX or copper.
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Walk down almost any street in Nanaimo built between the late 1970s and the mid-1990s — Departure Bay, Uplands, Hammond Bay, Harewood — and a good share of the houses were plumbed with Poly-B. Most of it has worked for decades. The problem is that when it fails, it usually fails suddenly.
What Poly-B is
Polybutylene piping was popular because it was cheap, flexible and fast to install. It can become brittle over time, and its fittings — especially early plastic fittings — are a common failure point. Failures tend to be a split or separated joint rather than a slow drip, often inside a wall or ceiling.
How to check your home
Look in these places:
- Top of the hot water tank — the pipes coming out
- Under kitchen and bathroom sinks — behind the shut-off valves
- The main water shut-off where the line enters the house
- Unfinished basement, crawlspace or garage ceilings
Poly-B is flexible plastic, usually grey, sometimes black or blue, and often stamped "PB2110". Beware: some homes have short copper stubs at fixtures with Poly-B hidden behind the wall.
Why insurers ask about it
Water damage is one of the most common home insurance claims in Canada, and insurers treat Poly-B as a known risk. Depending on the company, a home with Poly-B may face:
- Questions about it on applications and renewals
- Higher premiums or deductibles
- Limits on water damage coverage
- A requirement to replace it to obtain or keep coverage
Every insurer is different. Ask your broker directly what your policy says, and keep documentation once it is replaced.
Resale
Home inspectors flag Poly-B, and buyers' lenders and insurers ask about it. Sellers often end up offering a credit or replacing it under pressure during a sale. Replacing it on your own timeline is usually less stressful and gives you proof to show buyers.
What replacement involves
Waywest replaces Poly-B with PEX (or copper where preferred), typically:
- Walking the house to trace existing lines
- Planning new routes through crawlspaces, attics and closets
- Running new continuous lines with fewer joints, often from a central manifold
- Adding new shut-off valves at fixtures
- Pressure testing before closing anything up
Using flexible PEX keeps wall and ceiling openings small, and water is usually back on at the end of each working day. See Poly-B replacement for the full process.
If a fitting has already failed
A single failed Poly-B fitting is the clearest warning you will get: the rest of the system is the same age and material. Shut the water off at the main, call the 24/7 emergency line if water is escaping, and plan the full replacement once the immediate repair is done.
Planning it
Fall and winter are good times to schedule interior repiping. Request a quote — Waywest replies within the hour during business hours — and new customers save 5% with a coupon.
Common questions
Will my insurance cover a Poly-B leak?
It depends on your policy and insurer. Some insurers restrict water damage coverage for homes with Poly-B or require replacement as a condition of coverage. Check with your insurer or broker, and disclose Poly-B accurately if asked.
How do I know if my home has Poly-B?
Look at pipes leaving the hot water tank, under sinks and at the main shut-off. Poly-B is flexible plastic, usually grey, and often stamped PB2110. Homes built or replumbed from the late 1970s to the mid-1990s are most likely to have it.
Should I replace Poly-B before selling my home?
Home inspectors typically flag Poly-B, and buyers often negotiate for its replacement or have trouble arranging insurance. Replacing it before listing removes that issue from the negotiation.
Need this sorted out?
Call the Nanaimo office and talk to someone who can tell you what the work involves and when we can get to it.