grohe toilet flush problems

Grohe toilets, known for their push-button flush mechanisms, are a common choice for modern bathrooms. However, like any plumbing fixture, they can experience issues. A common problem is a constant stream of water running into the toilet bowl, accompanied by low-powered flushing noises. Here’s how you can troubleshoot and potentially resolve these issues.

Identifying the Problem

  1. Continuous Water Flow and Flushing Noises:
    • The continuous water flow into the bowl suggests a fault in the toilet’s flushing mechanism. The intermittent flushing noises indicate a malfunctioning component within the cistern.
  2. Possible Causes:
    • The issue might be due to a malfunctioning float valve not shutting off completely, or the flush valve not sealing properly. In Grohe cisterns, these components are critical for proper functioning.

Troubleshooting Steps

  1. Inspecting the Float Valve:
    • Located typically at the top left of the cistern, the float valve controls the water level. Try lifting the float (white plastic lever) to see if it stops the water flow. If lifting the float stops the water, the issue may be with the float valve not properly controlling the water level.
  2. Examining the Flush Valve:
    • Check if your Grohe toilet uses a flush valve (cylindrical, about 3-4 inches in diameter) rather than a siphon type. If the flush valve is the issue, it could be due to wear and tear or damage. Look for scale or damage on the washer at the bottom of the valve.
  3. Identifying the Model and Parts:
    • Grohe toilets often use ‘Adagio valves’ which are common components to fail. Ensure you know the model of your cistern to order the correct replacement parts.
  4. Purchasing Replacement Parts:
    • Based on the issue, you may need a ‘Dal 20.26.28 Flush Valve Cartridge’. Ensure to verify this part fits your specific Grohe model. This part can typically be found on plumbing supply websites.
  5. DIY Replacement:
    • Replacing the flush valve cartridge might resolve the issue, especially if you notice air bubbles or damage on the old valve’s rubber seal. Follow the manufacturer’s instructions or online tutorials for guidance.

Professional Assistance and Cost Considerations

  1. Seeking Professional Help:
    • If you’re not confident in performing these repairs, it’s wise to seek help from a professional plumber. Ensure they have experience with Grohe toilets.
  2. Cost Estimation:
    • The cost for a plumber to fix these issues varies based on location and the complexity of the job. However, DIY fixes can significantly reduce expenses.


Grohe toilet flush issues, like continuous water flow and intermittent flushing noises, are typically related to problems with the float valve or flush valve. Identifying the exact cause is crucial for an effective fix. While DIY solutions are possible, especially with access to the right replacement parts, seeking professional help can ensure safety and efficacy. Regular maintenance can also prevent such issues from arising.

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *