Water near the heater can come from a fitting, a valve, condensation, or the tank shell. The source decides the repair, so it helps to look before calling.

Cutaway-style graphic of a tank with its thermostat, burner or element, safety valve, and drain labeled in order
Visual guide for this article

Safe Steps to Take First When Water Appears

  • Switch off power at the breaker, or set a gas unit to its pilot setting
  • Close the cold water supply valve to the tank if it is safe to reach
  • Keep people and pets away from standing water near electrical parts
  • Never cap or plug a relief valve

Finding Where the Water Starts Before Calling

Dry the area and watch for the first drop. Connections at the top, the relief valve discharge pipe, and the drain valve are the usual suspects. A leak through the tank body usually means replacement.

What to Tell the Technician About the Leak

Describe where the water appears, how fast it flows, the make and model on the label, and any recent repairs. Photos help the technician bring the right parts.

Service Guides Related to a Leaking Tank

Continue with leak repair, relief valve repair, or replacement, or return to the Littleton hot water repair overview.