Tassimo Water Tank Crack or Valve Seal Failure

Water leaking from the back or side of the water tank when filled.

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Possible Causes

Hairline crack in tank body, Worn or hardened bottom valve seal, Damaged tank-to-base gasket, Impact damage from dropping the tank

How to Fix / Troubleshooting

Safety first: Remove the tank from the machine before testing for leaks.

  • Visual inspection: Hold the empty tank up to a bright light to look for cracks or stress lines.
  • Leak test: Fill the tank and place it on a dry paper towel on the counter. Check for drips or dampness under the tank after a few minutes.
  • Inspect bottom valve: Press the valve gently to ensure it springs back and seals. Look for deformation or debris.
  • Replace if damaged: If any cracks or persistent leaks are found, replace the water tank assembly. Do not attempt to glue or tape the tank, as this is unsafe.
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Repair Difficulty

Very Easy 1/5

Required Part

Water Tank Assembly
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