Review on NANPU 3/8" NPT Compressed Air Filter Regulator Combo Piggyback, 5 Micron Brass Element, Poly Bowl, Semi-Auto Drain, Metal Bracket, 0-150 Psi Gauge by Trey Dikici

I like the filtering aspect, and the regulator is spot on and doesn't wander away from set point. I never could stop the gauge/gauge threads from leaking air though. It was leaking somewhere behind the gauge and where it threads into the filter body housing itself. Another gripe is that when you thread the gauge into the filter body housing, there isn't enough room to get a wrench back there to really tighten down the gauge threads that goes into the body housing.I had another pressure gauge in my shop with 1/4" NPT threads. I just purchased a 1/8" MNPT to 1/4" FNPT adapter and threaded my gauge into the adapter. That fixed the leak and I now have a better quality gauge. Luckily, this regulator/filter combo is so cheap, I didn't mind spending a few bucks to get the brass adapter so I could thread my own gauge on it. Unit is now completely air tight.For the price, It's hard to beat the performance of this unit.