Ingersoll Rand ARO R37341-600-VS Air Regulator 1/2" NPT, w/Gauge - 250 psi Max Inlet,Black/Gray

Works fine. Easy to adjust. Gauge can be removed and relocated to other side for those who require a right to left flow.After approximately 3 months, unit developed a leak at the adjustment knob.As was suggested by another reviewer named Tom, I attempted to clean the unit.Here's how:Remove the top cap using an Allen key - rotate approx ⅛turn, then pry out gently (or apply air pressure to unit and the cap will get blasted out - be careful if using this method...)Remove the cap, spring, and plastic assembly inside.Use a cleaner or paper towel to clean out debris... Mine was filthy with rust and other contaminants.Use non-chlorinated brake cleaner or similar and spray the innards and all pieces out really well, and then blast with compressed air to remove cleaning solvent.Lubricate the o rings and reinstall all parts. Don't forget the spring!Cycle pressure adjustment from max to min a couple times to seat the o-rings.Voila, leak fixed for a total cost of $0.00 and about five minutes of time.Two stars deducted because this basic information was nowhere to be seen in any product documentation or on the manufacturer's website.EDITED AGAIN: another star deducted because after thoroughly cleaning the unit, it only worked for about a day before again developing a leak.

I bought this regulator a short while ago to complete another air drop project in my shop. I wanted a line close to the door so I can drag an air hose outside quickly to work on stuff outside the garage. When it was delivered, I examined it closely. I am plenty anal about my tools so I try to learn as much about them as possible before forming an opinion. This is a pretty simple devise and it does work as stated in the Amazon ad. It is nothing fancy. It won't dance, drink beer or shine your shoes. It's just an air pressure regulator. It does not come with a mounting bracket so you'll have to re-engineer one if you intend to mount it on a wall. One strike against. However, I discovered that it has some hidden features. I like my regulators to have the adjusting knob on top. I found that the gauge is removable. Just unscrew the plastic bezel ring around the gauge and remove the two Philips screws holding the gauge in. Turn the gauge 180 degrees, re-install the screws, re-attach the bezel and PRESTO! The gauge is now correct. Furthermore, the gauge can be moved around to the back by removing the rear air vent and swapping places with gauge. Neet!This thing does Not leak air (Yet! - if you dismantle it, make sure you tighten the screws well) and it works pretty well.So far, so good. I'll post an update it something changes.Overall, a nice little regulator.

What a difference from the stock cheapo regulator that came with my compressor. With cheapo regulator set pressure to 90psi, connected my impact wrench, almost 15psi drop in pressure. Installed this new ARO regulator from Ingersoll Rand. same setup, my impact wrench pressure set on regulator to 90psi, ran wrench, barely 5psi drop in pressure!! what a difference. Now the impact wrench runs really well. No leaks or other issues, just a great quality product. Highly recommend this unit.

I upgraded to this 3/8” from the lame factory regulators on my work site compressors, and noticed the line pressure got a lot more stable on things like nail guns. I can actually turn the pressure down, and get better nailing. Of course I also switched to 3/8 lines and high flow couplings, but what a relief when I tossed the factory 1/4” ones out!

Very nice product from IR, good quality. Simple and compact no leak at all. Would buy again.