Line pressure gauge, needle valve & flow regulator

Line in, pressure regulator & gauge, flow regulator, two connections for espresso machinery

John, a fellow coffee roaster living nearby, has built me a nice oak wood panel with some extensions to my (filtered) water line. It facilitates two output connectors for espresso machines, but more importantly, it has a combination of a needle valve to limit the line pressure, a pressure gauge to see the result and a flow regulator.

If I get a machine with a 'cold feed' heat exchanger which uses the line pressure for pre-infusion, I can now accurately regulate that pre-infusion pressure.

Must make sure an espresso machine will not be placed in front of it. That would ruin the view!