What years was Poly B used in Canada?
The straight answer
Roughly 1978 to 1998: from market introduction to the end of resin production. Homes built or replumbed in that window can have it; Alberta alone is estimated to hold about 148,000 Poly B homes.
The longer version
The installation window is roughly 1978 to 1998, ending when manufacturers stopped producing the resin. Alberta’s government estimates about 148,000 Poly B homes in that province alone. Whether your street sits in the window is checkable in seconds: the address checker works anywhere in Canada, and the neighbourhood profiles map it street by street for Calgary, Edmonton and Kelowna.
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