Plumber Red Seal · Question
A plumber is installing PEX-b tubing for a hot water recirculation line in a residential setting. What is the maximum recommended continuous operating temperature for PEX-b according to CSA B137.5?
According to CSA B137.5, PEX-b tubing is typically rated for a maximum continuous operating temperature of 93 °C (200 °F) at a reduced pressure. While it can ha
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Question: A plumber is installing PEX-b tubing for a hot water recirculation line in a residential setting. What is the maximum recommended continuous operating temperature for PEX-b according to CSA B137.5?
Answer options:
- 82 °C (180 °F) ✅ 93 °C (200 °F)
- 100 °C (212 °F)
- 60 °C (140 °F)
Correct answer: 93 °C (200 °F)
Explanation: According to CSA B137.5, PEX-b tubing is typically rated for a maximum continuous operating temperature of 93 °C (200 °F) at a reduced pressure. While it can handle higher temperatures for short periods, 93 °C is the standard for continuous hot water applications in plumbing.
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