I have a small machine shop. To start out I used regulators from RapidAir. I had three of them and all leaked around the plastic top and eventually around the water bowl. I run a 3/4 regulator at the compressor so the supply is 120psi regulated down to 100 at the machines. That shouldn't be high enough to cause the plastic tops to deform and leak but they did. I made an aluminum brace to better hold the plastic tops straight and that fixed the top leak. I never could get the bowl to stop leaking. New o-ring, good cleaning etc.. still leaked. I picked up two of these and So far they have been doing great. No leaks, the gauge seems accurate and the regulation is spot on. The added bonus of the air injector is great. My mill needed the extra lubrication as the tool changer gets cranky if I don't inject a little oil every once in a while. This saves me from having to bleed the air, disconnect the line and add the oil manually. Happy so far.