The Espresso Machine

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Refining the Temperature

EM 3.06 The Saturated Group Head

Photo: La Marzocco GS2.


In this video, BH Art Director, Jacob Thue shows us the inner workings of the saturated group head on the Kees Van Der Westen, Speedster.


An illustration from the La Marzocco GS patent (No. 882371) from 1970, prepared by Piero Bambi

In 1970, La Marzocco released their GS machine, which featured the group head welded directly onto a smaller brew boiler. The system was totally filled with water, hence GS for gruppo saturo (Italian for ‘saturated group head’). La Marzocco is well known for fabricating its boilers out of stainless steel rather than brass.