La San Marco - pressure switch

Also the espresso machine of La San Marco use pressure switches to switch the heating element on and off. The pressure switches used on San Marco coffee machines are made by the company Asco, in the past these where made by the company Sirai.

The models used are the Asco P302/6 and the Asco P303T01. These pressure switches have both a ¼” BSP-G thread. But they are rated differently. The Asco P302/6 can hold up to 30A where the P303T01 can hold max 20A. Both of these pressure switches have 3 contacts, so they can be installed in 3 phase espresso machines.