Triangle Tube System or DHW Water Leak

Water leaking from the bottom of the Triangle Tube water heater cabinet or from piping connections.

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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

Leaking relief valve, Corroded piping or fittings, Failed gasket on heat exchanger, Condensate misidentified as leak

How to Fix / Troubleshooting

Warning: Water leaks can damage property and electrical components. Turn off power if water is near wiring.

  • 1. Identify fluid type: Determine if the liquid is clear condensate, system water with inhibitor, or domestic water. Condensate is usually clear and slightly acidic; system water may be colored or contain inhibitor.
  • 2. Check relief valve: Inspect the pressure relief valve discharge pipe. If water is dripping or flowing, check system pressure and expansion tank function. Do not cap the discharge.
  • 3. Inspect visible joints: Look at all accessible unions, threaded joints, and compression fittings around the heater. Tighten slightly if seeping, but do not overtighten.
  • 4. Condensate system: Verify that the condensate trap and tubing are intact and not cracked or disconnected. Condensate leaks often appear at the base of the unit.
  • 5. Internal leaks: If water appears from inside the cabinet and the source is not obvious, shut off water supplies and contact a technician. Internal heat exchanger or tank leaks usually require component replacement.
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Repair Difficulty

Hard 4/5

Required Part

Pressure Relief Valve
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