Plumber Red Seal · Question
Thermal expansion in a closed-loop hot water supply system with a backflow preventer must be managed by installing a:
When water is heated, it expands. In a closed system, this expansion increases pressure and can damage pipes or cause the T&P valve to drip, requiring an expans
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Question: Thermal expansion in a closed-loop hot water supply system with a backflow preventer must be managed by installing a:
Answer options:
- Pressure reducing valve
- Tempering valve ✅ Potable water expansion tank
- Water hammer arrestor
Correct answer: Potable water expansion tank
Explanation: When water is heated, it expands. In a closed system, this expansion increases pressure and can damage pipes or cause the T&P valve to drip, requiring an expansion tank to absorb the increased volume.
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