Water Heater - Filling the Water Heater

The tank must be full of water before the water heater is turned on. The water heater warranty does not cover damage or failure resulting from operation with an empty or partially empty tank.

Filling the Water Heater

• Make certain the drain valve is completely closed.
• Open the shut-off valve in the cold water supply line.
• Open each hot water faucet slowly to allow the air to vent from the water heater and piping.
  • A steady flow of water from the hot water faucet(s) indicates a full water heater.
• Condensation can form on the tank and fittings when it is first filled with water. Condensation may also occur with a heavy water draw and very cold inlet water temperature.
  • This condition is not unusual and will disappear once water is heated. If the condition persists, examine fittings for potential leaks and repair as required.