What are Poly B pipes?
The straight answer
Flexible grey plastic water supply pipe, polybutylene, installed in Canadian homes roughly 1978 to 1998 and stamped PB2110 on the pipe wall. Degraded from the inside by chlorinated water; no longer accepted for new work.
The longer version
Polybutylene: the flexible, usually light grey supply pipe of the 1978 to 1998 era, identifiable by the PB2110 stamp in its print string. Chlorinated water degrades it from the inside, which is why it left the code and why insurers ask about it. Start with the basics chapter, then the identification guide to check your own home.
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Grounding
This answer summarizes material sourced in full on the chapter pages it links. If the facts change, the chapter changes first and this answer follows.
Published by Poly B Plumbing Guys
This library is maintained by the team that replaces Poly B every day across Alberta and BC. Red Seal certified plumbers, full remove-replace-restore service including drywall and paint, a 25-year warranty, and the completion certificate insurers ask for.
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