What is PE-RT pipe, and is it a good Poly B replacement?
The straight answer
PE-RT is polyethylene of raised temperature resistance, a flexible supply pipe certified under CSA B137.18 and newly added to the National Plumbing Code 2020. It carries the top chlorine-resistance rating and is one of the three main Poly B replacement options alongside PEX and copper.
The longer version
PE-RT stands for polyethylene of raised temperature resistance: a flexible pipe that installs like PEX, is certified under CSA B137.18, and entered the National Plumbing Code in the 2020 edition. It tests at the top chlorine-resistance class, which matters when the pipe being replaced failed from chlorine in the first place, and one major line of it is made in Surrey, BC. The approved pipe systems chapter compares PE-RT, PEX and copper on the evidence.
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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.
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