Inspection Report Terms

Thermal expansion in a home inspection report

Heated water expands and increases pressure on tanks and pipes. Urgency: The pressure stresses the water-heater tank. Fix: An expansion tank absorbs the force of expanding water.

Source: InterNACHI Inspection Narrative LibraryRetrieved 2026-11-06Independent explanations from HomeRecord, not a government agency, inspection company or source publisher.

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Meaning
Heated water expands and increases pressure on tanks and pipes.
Urgency in the source
The pressure stresses the water-heater tank.
Typical fix or next step
An expansion tank absorbs the force of expanding water.
Read the source
InterNACHI Inspection Narrative Library, retrieved 2026-11-06

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This explains the term, not the condition of your home. The source may describe several possible causes or repairs. Ask your inspector which applies. No cost, repair deadline or local code ruling is inferred here. Read the method and limits.

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