Verify that the aerator isn’t clogged. Remove it, clean it with water, and reinstall.

• Check if the shut-off valves under the sink are fully open.
• Inspect the supply lines for kinks or blockages.

Generally due to a worn or dirty cartridge.

• Remove and clean the cartridge according to the instructions in your manual.
• If the problem persists, the cartridge may need to be replaced.

• Check the anti-limescale nozzles. Gently rub the nozzles with your fingers to remove limescale buildup.
• If necessary, soak the showerhead or hand shower in a solution of equal parts warm water and white vinegar for several hours, then rinse thoroughly.

• Disassemble and inspect the product.
• Clean any mineral buildup from the nozzles and check for possible obstructions.

For a pressure-balanced valve:

• Frequent temperature variations are usually caused by sudden changes in water pressure within the plumbing system (e.g., simultaneous use of other faucets or appliances).
• Check and clean the pressure balance cartridge according to your manual.
• Ensure the cartridge is free from mineral deposits by cleaning it with a vinegar-water solution.
• Apply plumbing grease before reinstalling to optimize functionality.

For a thermostatic valve:

• Constant fluctuations usually indicate that the thermostatic cartridge is obstructed or that mineral deposits prevent precise temperature regulation.
• Remove the thermostatic cartridge as per your manual, then thoroughly clean it with a vinegar-water solution.
• Check the condition of the integrated filter (if applicable), clean it or replace it if necessary.
• Apply plumbing grease before reinstalling to ensure precise temperature control.

• Ensure the pipes used meet recommendations (copper pipes recommended; PEX pipes may cause vibrations).
• Ensure all fittings are properly tightened and correctly installed.