Weil-McLain External Condensation

Condensation or water appears on the outside of the Weil-McLain water heater tank or piping.

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Possible Causes

Cold water in tank with humid ambient air, Lack of pipe insulation, Mixing valve set low causing cool tank temperatures, Minor seepage mistaken for condensation

How to Fix / Troubleshooting

Safety first: Ensure any water on the floor is not from a leak before assuming condensation.

  • Differentiate leak vs. condensation: Dry the tank and piping thoroughly, then observe. Condensation will form as a thin film, while leaks will reappear at specific points.
  • Insulate cold surfaces: Install pipe insulation on cold water lines and consider insulating the tank if not already insulated.
  • Improve ventilation: Increase air circulation in the mechanical room to reduce humidity.
  • Check for slow leaks: Inspect fittings and valves closely; repair any seepage that may be misinterpreted as condensation.
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Repair Difficulty

Very Easy 1/5
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