Which is the primary reason for insulating cold water pipes in unheated spaces?

• A. To prevent condensation
• B. To prevent freezing in cold climates
• C. To increase water pressure
• D. To make pipes look nicer

Answer: (B)

Insulating cold water pipes in unheated spaces is mainly about preventing the water in the pipes from freezing in cold conditions. When the surrounding space dips toward or below freezing, heat tends to leave the water through the pipe to the cold air. Insulation slows that heat loss, so the water stays warmer for longer and the pipe is less likely to freeze and burst.

Condensation can appear on cold pipes in humid spaces, but the primary concern in unheated areas is freezing. Insulation helps with energy efficiency and freeze protection rather than increasing pressure or improving appearance.