Elektra O-Ring Grouphead Top and Heating Exchanger Nut

Elektra Viton O-Ring for the top of the grouphead

On some Elektra models, this O-Ring is located under the nut 00026014 or 00921021

It is also used on the top of the heating exchanger on Commercial machines, as well as on Microcasa Levas and Semiautomaticas between the grouphead and the boiler, from 1997 onwards.