Water heater is leaking from the bottom of the casing
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn off power and close the cold water supply to the heater. If leak is significant, also close the gas valve.
Step-by-step checks:
- Identify source: Remove the front cover and use a flashlight to trace the leak upward. Check around the heat exchanger, pump, and all unions.
- Check safety valve: Inspect the discharge pipe from the safety relief valve. If water is dripping steadily, system pressure may be too high or the valve may be faulty.
- Tighten unions: Gently tighten any accessible union nuts that are visibly leaking, taking care not to overtighten.
When to call a professional: Heat exchanger or pump leaks require component replacement by a qualified technician.
Repair Difficulty
Required Part
We may earn a commission from links on this page.