La Marzocco Internal Plumbing Leak

Water leaks from the bottom of the machine or inside the cabinet during operation.

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Loose compression fittings on copper lines, cracked silicone hoses, leaking boiler gasket, leaking safety valve or vacuum breaker

How to Fix / Troubleshooting

Safety first: Turn OFF and unplug the machine. Close the water supply and allow boilers to cool and depressurize. Water near live electrical parts is dangerous.

Steps:

  • Remove panels: Take off side and rear panels to visually inspect for signs of water trails, corrosion, or active drips.
  • Identify leak source: Run the machine briefly (if safe) and observe where water emerges: from fittings, hoses, boiler seams, or valves.
  • Tighten fittings: Gently tighten any loose compression nuts on copper lines. Do not overtighten, as this can crack fittings.
  • Replace damaged hoses: Any cracked or swollen silicone hoses should be replaced with high-temperature food-grade hose of the correct size.
  • Check safety valve and vacuum breaker: If these components are constantly venting water, they may be scaled or failing and should be replaced.
  • Boiler gasket leaks: If water seeps from boiler flanges, a boiler teardown and gasket replacement is required; this is best handled by a professional technician.
Advertisements

Repair Difficulty

Professional Required 5/5

Required Part

Vacuum Breaker Valve
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements