Poly-B, Kitec and Galvanized: The Plumbing a Canadian Insurer Can Decline to Cover

Plumbing is not an incidental detail on an application. The Insurance Bureau of Canada lists it among the factors that set home insurance rates, stating in its explanation of how home insurance rates are set that "galvanized steel or lead pipes are more likely to crack and leak," and that upgrading to copper or plastic plumbing can help reduce the cost of insuring a home.

Read that carefully, because the wording is informative in two ways. The industry body names galvanized steel by name — not the branded systems — and it frames the consequence as price rather than refusal.

Provincial regulators use the same conditional register. Consumer material from the Financial Services Commission of Ontario on insurance coverage issues affecting older homes states that galvanized steel pipes were commonly installed in homes prior to 1950, that their average life expectancy is 40 to 50 years, and that "your insurance company may require you to replace galvanized steel piping with copper and plastic piping before providing you with insurance coverage." The Commission's closing advice is worth repeating verbatim in spirit: given the wide range of inspection and upgrade requirements insurers may have, speak to your own insurance representative about your own situation.

Brokers report more concrete mechanics. An Alberta brokerage's guide to identifying plumbing types states that homes with galvanized steel can be very difficult to insure, and that Poly-B homes require a certified plumbing inspection before the home can be insured. That is one province's market practice rather than a national rule — but it is the most checkable version of what "the underwriting question" actually means in daily practice: not a refusal, a condition.

And insurers themselves publish positions that vary. Square One states in its reference on Kitec plumbing that it can insure most homes with Kitec, particularly where the system has no history of leaking, but that a higher deductible will apply to any loss resulting from it. Canadian insurance publishers describe a broader spread for Poly-B: some insurers decline the risk, others charge higher premiums, impose higher water-damage deductibles, or limit coverage.

The honest summary is this. Appetite varies by insurer, by province, by the house's claims history, and over time. Nobody — including this article — can tell a homeowner what a specific insurer will do. What is predictable is the shape of the conversation: presence, leak history, and whether anything has been done about it.

The precedent is familiar to anyone who has dealt with the electrical equivalent. Insurers ask the same style of question about knob-and-tube wiring and whether it can be covered, where a documented professional inspection is, for some insurers, an accepted alternative to full replacement.

Three levels of work exist, and they are not interchangeable in an underwriter's eyes.

A full repipe replaces the supply system end to end. It is the only option that removes the question entirely, because there is nothing left to ask about. A partial repipe replaces the accessible runs — typically a basement and mechanical room — and leaves pipe in finished walls and ceilings. It reduces exposure and it is frequently what a budget allows, but it usually does not close the underwriting question, because the honest answer to "is there still Poly-B in the house" remains yes. Fitting-only work on Kitec addresses the actual failure point, and it is treated inconsistently: some insurers credit it, others regard the system as a system.

A homeowner choosing partial work should choose it knowing that the insurance benefit may be zero even where the engineering benefit is real.

The Documentation Package

Whatever the scope, what an insurer evaluates is paperwork. A whole-home repipe is permitted work: a permit is required to install, change or upgrade any part of a plumbing system, it is generally pulled by a licensed contractor, and an inspection is required before the permit is finalized. As the Canadian repipe reference Poly B Canada puts it, the permit and inspection record form part of the documentation package an insurer will want after a repipe, alongside the completion certificate. Permit requirements are set municipally, so confirm the local process rather than assuming another city's rules apply.

Ask any contractor, before the first invoice is paid, to commit in writing to providing:

• The plumbing permit number and issuing municipality
• The final inspection record
• A completion certificate
• A written scope statement naming exactly which runs were replaced and which were not
• Photographs of the work before walls were closed

That last item is the one most often skipped and most often wanted later. Cost sits in a wide band: Canadian insurance publishers report Poly-B repipe figures between $3,000 and $25,000 depending on home size and complexity, and note that a home may be easier to insure once the system is gone. Treat that as an order of magnitude for deciding whether to make the call, not as a quote.

The sequence matters more than the speed.

1. Locate and photograph. Water heater first, then the main shutoff, then one upper-floor under-sink cabinet. Capture the pipe, the printed stamp and at least one fitting.
2. Record the stamp exactly. PB2110, CSA-B 137.8, KTC, CSA B137.9/10, ASTM F1974 — or threads and no printing at all, which points at steel.
3. Check the two controllables. Supply pressure at a hose bib and the water-heater setting. Both are cheap to measure and both bear directly on the failure modes above.
4. Ask the broker a specific question. Not "is my plumbing a problem" but "the house has [system], installed [year], with [fitting type], no leak history — what does that change on this policy, and what would change it back?"
5. Get the repipe quote before renewal, not after. A quote in hand turns an open-ended underwriting question into a plan with a date on it, and that is a materially different conversation.

One seasonal note: houses old enough to contain any of these systems are also old enough to have marginal insulation around exterior-wall plumbing runs, which is worth reviewing alongside the standard freeze-prevention measures for Canadian homes.