Attached are pictures of the pressure regulator and barometer for the auxiliary water
cooling circuit.  This circuit serves the power meters and water-cooled beam dumps on
the table.  The pressure in the circuit was ~3.5 bar, which seems to coincide with when
the regulator is fully closed.  The pressure is ~2.2 bar with the regulator fully open.

Useful information to have when or if we decide to remove the regulator from the cooling
circuit in the quest to simplify things.