Is Poly B with copper fittings okay?
The straight answer
Meaningfully lower risk than plastic acetal fittings, and the norm in Canadian installs, but the pipe between the fittings is the same aging polybutylene, and insurers underwrite the pipe.
The longer version
It’s the better version of the problem. Metal insert fittings with copper crimp rings, the Canadian norm per Alberta’s guidance, avoid the acetal plastic fittings that carried the worst failure record. But chlorine attacks the pipe wall regardless of what joins it, which is why insurers ask “is there Poly B” and not “what fittings.” The failure chapter breaks down fittings versus pipe risk.
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Grounding
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