Poly B Replacement
WATER DAMAGE RISK

Do you have Poly B plumbing in your Home?

What is Poly-B Plumbing

  • Plastic (polybutylene) water supply piping used mainly from late 1970s–1990s

  • Commonly grey (sometimes blue/black) flexible piping

  • No longer approved in Canadian plumbing codes

Key Risks & Issues

Material Failure

  • Deteriorates when exposed to chlorine and oxidants in municipal water
  • Becomes brittle over time, leading to cracks and sudden bursts
  • Failures often occur without visible warning

Leaks & Water Damage

  • High risk of hidden leaks inside walls and ceilings
  • Can cause:
    • Significant water damage
    • Mold and mildew growth
    • Structural deterioration
  • Repairs are often emergency-based and costly

Weak Fittings

  • Early Poly-B fittings are prone to failure
  • Joints and connections often fail before the pipe itself

Insurance & Financial Risks

  • Many insurers:

    • Refuse coverage for homes with Poly-B

    • Charge higher premiums
    • Exclude water damage related to Poly-B

  • Some require full replacement to maintain coverage

Real Estate & Resale Concerns

  • Considered a red flag during home inspections
  • Buyers may:
    • Request replacement prior to closing
    • Negotiate lower purchase prices
    • Walk away from deals entirely
  • Can negatively impact home value and marketability

Regulatory Status

  • Removed from the National Plumbing Code of Canada
  • No longer permitted for new installations
  • Widely recognized as an obsolete, high-risk material
Recommended Action

  • Spot repairs are not considered reliable

  • Full replacement with modern materials (PEX or copper) is recommended

  • Benefits of replacement:

    • Restores insurability

    • Reduces risk of water damage

    • Improves resale value and buyer confidence

Frequently Asked Questions

Find answers to common questions about our services.

Polybutylene (Poly B) is a type of plastic plumbing pipe that was commonly used in Canadian homes from the late 1970s to the mid-1990s. Over time, the material can deteriorate and become brittle, which increases the risk of leaks or sudden pipe failures. Because of these risks, Poly B is no longer used in modern plumbing systems.

Poly B pipes are usually gray or blue plastic and are often stamped with the letters “PB.” They are commonly found near water heaters, under sinks, or in exposed basement plumbing. A professional inspection is the safest way to confirm whether your home has Poly B piping.

In many cases, yes. Even if the pipes have not failed yet, Poly B can degrade over time and may eventually leak or burst. Many homeowners choose to replace the system proactively to prevent future damage and improve insurability.

Many insurance providers either refuse coverage or place restrictions on homes with Poly B plumbing because of the higher risk of water damage. Some insurers may offer temporary coverage if replacement is scheduled, but requirements vary.

The cost to replace Poly B piping in an Ottawa home typically ranges from $9,000 to $15,000, depending on the size of the home and the complexity of the plumbing system. This estimate usually refers to the plumbing work itself and may not include finishing work such as drywall repair.

Poly B systems are typically replaced with PEX or copper piping, which are more durable and widely accepted by insurance companies. During the process, some drywall may need to be opened and repaired afterward. Many homeowners also choose to bundle additional upgrades while the walls are accessible.

Poly-B plumbing doesn’t fail slowly — it fails suddenly.

Identify it early, assess your risk, and take action before damage occurs.

Reach out today for your Free Home Assessment