How to Spot Poly B Piping in Your Home

Learn how to identify aging polybutylene pipes or upload a photo for instant evaluation by our Red Seal plumbers.

Craftsmanship Built to Last, Backed by Twice the Coverage

Most plumbing and heating contractors in Metro Vancouver offer a standard 1-year labour warranty. At Flex Plumbing Ltd, we believe that if a job is done correctly by licensed Red Seal tradespeople using high-grade materials, it should perform flawlessly for years to come.


That is why we back all qualifying installations, repipes, drainage fixes, and heating upgrades with a full 2-year labour warranty—double the industry standard. From complete Poly B replacement in Richmond to boiler installations in Vancouver, you receive total peace of mind knowing your property is protected.

Double Industry Standard: 24 full months of labour protection from the date of service completion.

Red Seal Standards: All work is executed or directly supervised by certified Red Seal journeypersons.

Zero Out-of-Pocket Recourse: If a covered repair fails within 2 years, we return and fix it for free, no dispatch charges.


Key Characteristics of Poly B (Polybutylene) Piping

Pipe Material & Color

  • Flexible plastic piping, most commonly light grey in color (though occasionally dark blue or black).
  • Ranging in size from 1/2-inch to 1-inch diameter water supply lines.

Pipe Markings & Codes

  • Stamped text along the side of the pipe body displaying codes like "PB2110".
  • May show pressure ratings and manufacturing standards (e.g., CSA or ASTM codes).

Fittings & Crimp Rings

  • Joined using metallic copper crimp rings, aluminum bands, or plastic insert fittings.
  • Shows signs of white flaking, corrosion, or hairline stress cracks near joint connections. 
  • Near Hot Water Tanks: Inspect the main supply lines feeding directly into or out of your hot water heater.
  • Under Kitchen & Bathroom Sinks: Look inside vanity cabinets where pipes exit walls to connect to shut-off valves.
  • Behind Washing Machines & Laundry Trays: Check open plumbing access boxes in laundry rooms.
  • At Main Water Shut-Off Valves: Examine exposed piping in basements, crawlspaces, or utility closets where water enters the home.

Where Poly B is Commonly Found in Homes

Unsure If You Have Poly B?
Send Us a Photo!

Don't stress over identifying your pipe materials. Take a clear, well-lit photo of your exposed water lines or shut-off valves,
upload it below, and our Red Seal plumbing team will review it and confirm your pipe type for free.

Poly B Identification FAQs

  • Q: Is all grey plastic pipe in Metro Vancouver homes Poly B?

    A: While most flexible grey water supply piping installed between 1978 and 1995 is Poly B, some newer grey PEX or PVC drain lines exist. Uploading a photo helps us confirm the exact material.

  • Q: What should I do if I find a leak on my Poly B pipe right now?

    A: Shut off your main water supply valve immediately and call (236) 833-8017 for emergency response across Metro Vancouver.

  • Q: Why do insurance companies ask about Poly B piping?

    A: Because Poly B degrades internally over time from chlorine exposure, insurers view it as a high risk for water claims and frequently require repiping prior to issuing or renewing policies.