Typical signs
- Water at the base, corroded fittings, dripping relief valve, brown water or popping noise.
Where it is often found
- Electric, gas, heat-pump and indirect water heaters.
What it can mean
- Perforated tank, corroded fitting, high pressure, missing/failed expansion tank or sediment.
What to check next
- Identify exact source without defeating protections.
- Check age, pressure, pan, drain and history.
Reasonable immediate actions
- Shut off energy and water using a safe procedure if actively leaking.
When to stop and call a professional
- Relief valve, gas, electrical connection, tank leak, excessively hot water or abnormal pressure.
Prevention
- Manufacturer maintenance, controlled pressure, pan/alarm and planned replacement.