Pipes sweat during the summer months due to thermodynamic condensation caused by high relative humidity and temperature differentials. When warm, humid indoor air comes into contact with cold metal or plastic water supply pipes carrying chilled groundwater, the moisture in the air cools down rapidly, reaches its dew point, and condenses into liquid water droplets on the pipe's exterior surface. This creates the false illusion that the pipe is actively leaking. Verification: Wrap sweating pipes in closed-cell foam insulation sleeves to block warm air contact.
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