State
T&P Valve Discharge
State water heater: water leaking from the temperature and pressure (T&P) relief valve discharge pipe.
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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.
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Possible Causes
Excessive water temperature, Excessive system pressure, Failed T&P valve, Closed expansion in a closed plumbing system
How to Fix / Troubleshooting
Safety: Hot water from the T&P valve can cause burns. Do not cap or plug the discharge pipe.
- Check temperature setting: Ensure the thermostat is set to 120°F. Overheating can cause T&P discharge.
- Test T&P valve: Lift the test lever briefly to flush debris. If it continues to drip after operating normally, replace the valve.
- Check system pressure: Have a plumber measure static and thermal expansion pressure. Install or service a thermal expansion tank if needed.
- Replace T&P valve: If the valve is leaking despite normal temperature and pressure, replace it with a properly rated valve.
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Repair Difficulty
Medium
3/5
Required Part
Temperature and Pressure Relief Valve
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