“Sweating”pipes and plumbing fixtures in summer time or during seasonal changes are often not a sign of faulty plumbing. Condensation of water vapor in the air, forms beads of moisture in warm weather on exposed pipes and fixtures containing cold water. However, when a toilet tank continues to “sweat” for hours after it has been used, it is a sign that cold water is continuing to flow through the toilet. This could be due to an improper adjustment of the tank valve or a leak.