I will start my first dive in a newly serviced reg and work it at perhaps 30-40 feet for a bit and if the flow and more importantly the sound seems correct I will get a little depth with it and see how it works. I have 2 regs that I dive and the valves in them both have a unique sound to themselfs and I put a lot of stock in the mechanical noises made from a machine that I use a lot. I may be goofy but thats how I do it. I have worked in the service and repair of technical equipment for over 30 yrs so maybe its a bad habit.
Bill........Dive safe
Bill........Dive safe