Make-up water - pics

Mark_46

In my make-up water pipe line there is the ball valve, a backflow preventer and a pressure reducing valve. Pretty sure that's what each device is by name, correct?

I'm interested in confirming if the ball valve in the pic should be normally open or closed? These pictures were taken before the job was done but the location and configuration on the make-up line is the still the same.

Thanks for any info anyone can provide.