Water drips from the vacuum breaker valve on top of the boiler during warm-up or even after reaching temperature.

Safety first: Turn off and unplug the machine. Allow the boiler to cool and depressurize before working on the vacuum breaker.

• Normal behavior check: A small amount of steam and water discharge during warm-up is normal until the valve closes. Continuous leaking after warm-up is not.
• Inspect valve: Remove the vacuum breaker and check for scale or debris on the sealing surfaces.
• Clean or replace: Descale the valve components and reassemble, or replace the entire vacuum breaker with a Rocket-compatible part if the seal is worn.
• Reinstall correctly: Ensure the valve is installed upright and tightened to the correct torque to prevent leaks.