Ask your insurer. Keep the answer.

Insurers care about plumbing because water damage is one of the most frequent and costly home claims, and they price the chance of a leak into every policy.¹¹⁴ Poly-B worries them because it degrades from the inside, often invisibly, and fails under ordinary water pressure.¹⁵

Westland Insurance, a Canadian brokerage, lists what an insurer may do once it knows a house has poly-B:¹

• add a surcharge to the premium;
• set a deadline for replacing the pipe;
• decline to offer water-damage coverage;
• decline to offer any property coverage at all.

The Alberta Real Estate Association says the industry has taken a harder line as late-1990s installations approach the end of their economic life, with some insurers giving homeowners time to replace if they install flood detection or automatic shut-off valves.² The Insurance Bureau of Canada, the national industry association, says more simply that some insurers may have exclusions for poly-B and that you should ask your own representative.⁴

The outcome for a given house depends on the insurer, the province, the home, its loss history, how the poly-B was installed and guidelines that keep changing.⁷ That is why the tables below describe reported positions rather than rules.

Insurers do not publish a template, but a report that answers the questions above saves a round of emails. Ask the plumber to cover:

• a visual examination of all accessible poly-B pipe and fittings;
• any leaks, staining, stress cracks or visible deterioration;
• the fitting type (copper or brass versus plastic acetal) and crimp condition;
• the approximate installation date and whether any continuous hot-water recirculation is on poly-B;
• measured water pressure;
• the extent of the system and an itemized estimate to replace it.

Keep the plumber’s name, trade certificate number and company details on the letter. One Alberta agency says that without a certified inspection showing the system is sound, getting coverage can be nearly impossible.³ A report cannot see inside the pipe, though, and poly-B can look normal from outside while degraded within, so expect underwriters to treat it as evidence of condition, not proof of remaining life.¹⁵

Renewal is when many owners first learn their insurer cares about poly-B. Read the renewal package and any questionnaire as carefully as a new application, and correct any plumbing or loss-history answer that has changed.⁷

If the renewal carries a replacement condition or a notice of non-renewal:⁷

1. Put the deadline in your calendar the day it arrives.
2. Ask the insurer, in writing, exactly what proof will satisfy the condition: invoice, permit, final inspection, photos or a contractor’s letter.
3. Start shopping for other coverage well before the current policy expires, not after.
4. Book replacement quotes early so the work can finish, and be inspected, before the deadline.

A water loss while poly-B is still in place can change the next renewal. Square One warns of a large increase in premium or deductible, or a decision not to renew, after a poly-B leak.⁸ Once the pipe is replaced and documented, ask whether any surcharge or special deductible comes off, and when.

Shut off the water at the nearest valve or the main if it is safe to do so, keep clear of electrical equipment near the water, and call a plumber.⁷ If the loss may be covered, report it promptly and gather evidence: photos of the leak, where it came from and the damage, the damaged materials themselves where it is safe to keep them, and receipts for cleanup.⁷

Standard policies generally respond to the sudden and accidental escape of water from plumbing, not to gradual deterioration, so the water damage and the cost of new pipe may be treated differently.⁵⁷ Your deductible, exclusions and the timing of the loss all matter.

Sort out insurance before your conditions expire, not after. A practical sequence for buyers:⁷⁸

1. Confirm whether the house has poly-B, and ask the seller for every record of leaks, repairs and insurance claims.
2. Have a licensed plumber inspect it and quote a replacement, broken down into plumbing, access, drywall, paint, temporary accommodation and permits.
3. Get a home insurance quote with poly-B disclosed, and make sure you can insure the home until any replacement is done.
4. Use the estimate to negotiate a lower price, or ask the seller to replace the system before closing.
5. For a condo, find out which piping belongs to the unit and which is common property before you take on repair responsibility.

If the plumbing was partly updated, insurers will likely want to know the percentage of each type, so ask for the invoices and a map of what changed.⁸

Expect buyers to ask. A home inspection should tell them what plumbing the house has, and their insurer will want to know before binding coverage.⁸ Having the documentation listed above ready, whether for a system you kept or one you replaced, shortens that conversation.

What a seller must disclose, and on which form, depends on the province and the listing and purchase documents in use. Ask your REALTOR® and your lawyer before you list; a general website cannot answer that for your sale.

If you replaced the system, include the permit and final inspection: a municipal sign-off is independent evidence that the new plumbing was checked.