Pentair
Internal Water Leak
Water is leaking from the bottom of the heater cabinet.
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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
Cracked heat exchanger, Failed header gasket or O-ring, Loose union on inlet/outlet, Corroded internal piping
How to Fix / Troubleshooting
Safety: Turn off power and pump. Close isolation valves to the heater before opening the cabinet.
- Identify leak source: Remove front and side panels and use a flashlight to trace the leak. Check unions, header, and heat exchanger connections.
- Tighten unions and fittings: Gently tighten any loose unions on the inlet and outlet. Do not overtighten plastic fittings.
- Inspect header gaskets: Look for water seeping at the header-to-heat-exchanger joint. Replace gaskets/O-rings if leaking.
- Heat exchanger inspection: If water appears to come from inside the exchanger bundle or from rusted areas, the exchanger may be cracked and require replacement.
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Repair Difficulty
Hard
4/5
Required Part
Header Gasket / Heat Exchanger
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