This little Iwata Mac valve permits quick and on the fly control of your pressure. Great addition and so reasonably priced.
This is a fantastic gizmo. Now I can adjust the air pressure easily and precisely while leaving the regulator at full pressure. This also means the compressor doesn't just run constantly when spraying at low pressure, which is an added bonus. I don't know how I did without it all this time.
Exceptional service and it arrived in just a couple of days.