Safety valve most Pasquini and Bezzera machines. Safety valve is standard threading and will fit most espresso machine brands such as La Cimbali and La Marzocco.
Pasquin recommends to change this part at least every 5 years as a precaution in case of an over pressurized boiler incident.
Safety valve will NOT fit Livia G4 and Bezzera BZ13 models. For those machines, please see part number 7433018.