Plumber Red Seal · Question
What is the purpose of an expansion tank in a closed-loop hydronic heating system or a domestic hot water system?
An expansion tank absorbs the volumetric changes of water caused by heating. As water heats up, it expands, and the expansion tank provides a space for this inc
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Question: What is the purpose of an expansion tank in a closed-loop hydronic heating system or a domestic hot water system?
Answer options:
- To increase water pressure ✅ To accommodate the thermal expansion of water
- To filter impurities from the water
- To reduce noise in the piping system
Correct answer: To accommodate the thermal expansion of water
Explanation: An expansion tank absorbs the volumetric changes of water caused by heating. As water heats up, it expands, and the expansion tank provides a space for this increased volume, preventing excessive pressure buildup.
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