Nuova Simonelli Oscar Anti-Vacuum Kit coffee-technician-gifts An 18mm zinc-plated brass group

An 18mm zinc-plated brass group cap used across several classic lever machine platforms

This is the older-style "normal" cartridge heat exchanger used on Astoria CMA espresso machines

brass valve body

Millennium

Nuova Simonelli Oscar Anti-Vacuum Kit coffee-technician-gifts An 18mm zinc-plated brass groupOscar Boiler Anti Vacuum Conversion Kit A complete parts kit that converts the boiler fitting on the Nuova Simonelli Oscar to accept an anti siphon (anti vacuum) valve, letting air escape as the boiler heats instead of drawing air back through the group on cool down. SPECIFICATIONS 1 x boiler safety valve 1 x anti vacuum valve 4 x PTFE gaskets (2 for the safety valve, 2 for the tee's female port) 1 x copper gasket for the anti vacuum valve 1 x 1 4"