LA MARZOCCO BOILER SAFETY VALVE
This is the original 1.8 bar safety valve for the following La Marzocco machines:
 Linea Classic / FB70 / Linea PB / Strada EP / Strada MP / Strada AV / Strada EE / Leva 
The purpose of the safety valve is to release excessive steam 
pressure in the case of a fault in the steam heating system. This one is
 factory set to 1.8 bar and isn't adjustable. It's recommend that it is 
changed annually as the safety relief valve is an important safety 
feature of the steam boiler.