La Marzocco GS3
Took delivery of machine two days before Christmas, has given me a whole new perspective on brewing coffee, everything happens so quickly especially steaming the milk.
One question - does it have a 3 way valve that needs backflushing? I cannot find any mention in the manual
Yes- definitely requires backwashing.
Easy to do with blind filter etc. A number of examples on YouTube if you do a quick search of "Backflush GS3" and similar.