Ariston 65114656 Flange Screw M6X12

The Ariston flange screw, part 65114656, is an M6 x 12 mm threaded fixing used on Ariston Andris Lux and Andris Lux Eco water heaters. It holds the flange that closes the element or immersion boss against the cylinder body, keeping the joint clamped onto its gasket under normal operating pressure. It is a small consumable fixing rather than a serviceable assembly, and it is normally replaced when the flange is removed for element or gasket work.

• The screw is missing, loose or will not torque down, leaving the flange joint slack
• Water weeping or a chalky scale trail around the flange or element boss
• The screw head is corroded, rounded or seized, so it cannot be removed or refitted cleanly
• The flange sits unevenly and the gasket is not being compressed evenly around the joint
• Thread damage in the screw or the tapped boss after repeated strip-downs

• Check the model and serial plate on the cylinder to confirm it is an Andris Lux or Andris Lux Eco unit
• Confirm the fixing is M6 x 12 mm, as thread size and length vary between flange assemblies
• If the flange has been disturbed, check whether the flange gasket also needs replacing before the joint is reassembled
• Isolate the electrical supply and drain the cylinder before removing the flange or its fixings