Kospel Relief Valve Discharge

Water drips from the pressure relief valve connected to the heater.

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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

Thermal expansion in closed system, Faulty or contaminated safety valve, Excessive inlet pressure, Incorrect installation without expansion vessel

How to Fix / Troubleshooting

Safety: Hot water from the relief valve can cause burns. Do not cap or block the discharge pipe.

  • 1. Check temperature: Ensure the heater is not overheating; verify setpoint and operation.
  • 2. Measure inlet pressure: If possible, measure cold-water pressure. Install or adjust a pressure-reducing valve if pressure exceeds Kospel’s limits.
  • 3. Expansion control: In closed systems, install an appropriately sized expansion vessel on the hot-water line.
  • 4. Test valve: Operate the relief valve manually to flush debris. If it continues to drip, replace it with a new valve of the correct rating.
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Repair Difficulty

Medium 3/5

Required Part

Safety / Pressure Relief Valve
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