Hi everybody...to say I'm a rookie is an understatement....perhaps someone out there can give me some advice.

I have a well to supply my house and here in Spain electricity is tremendously expensive. When I want even just a cup of water, the well pump comes on, I presume, then switches off again.
Lots of people I know have a pressure vessel, and I understand how they work. Now.....

I have, at the head of the well, a SACI Presscontrol Hydraulic System, which appears to be a pressure switch.

My question is this.......can I install a pressure vessel alongside this pressure control or will I have to remove this and use another pressure switch?

Your advice would be very much appreciated