Moccamaster Brew Basket Overflow or Seal Failure

Water leaks from around the brew basket area

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Possible Causes

Clogged paper filter or too fine grind, Faulty drip-stop valve in brew basket, Misaligned brew basket, Cracked brew basket or gasket

How to Fix / Troubleshooting

Safety: Turn off and unplug the coffee maker. Allow hot water and steam to dissipate before handling the brew basket.

  • Check filter and grind: Ensure you are using the correct size filter and not overfilling with coffee. Avoid very fine espresso grinds that restrict flow.
  • Inspect brew basket: Remove the brew basket and check for cracks or warping. Verify that the drip-stop valve moves freely and is not stuck closed by coffee residue.
  • Clean drip-stop valve: Rinse the basket thoroughly. Use a small brush to clean around the valve mechanism. Soak in warm soapy water if residue is heavy.
  • Check alignment: Reinstall the brew basket, ensuring it is fully seated and correctly aligned with the outlet arm and carafe lid (if using an automatic drip-stop system).
  • Replace damaged parts: If the basket or its gasket is cracked or deformed, replace the brew basket assembly or gasket.
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Repair Difficulty

Very Easy 1/5

Required Part

Brew Basket with Drip-Stop Valve
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