1/2”NPT Compressed Air Filter Regulator Piggyback Combo, Semi-auto Drain, 5 Micron Brass Filter, Gauge and Bracket, Poly Bowl with Metal Guard AW4000-N04A

This had very minor leak on the output side (even with teflon tape) but it worked well for me to regulate air out of a portable tank (that doesn't have a regulator) for blowing out my sprinkler lines. Also, since the leak was on the output side, it only leaked when the regulator was open, there was no observed leakage when the regulator was closed which is much more important to me. Pressures seemed to be somewhat accurate based on the behavior of my sprinklers, but I don't have a way to check super precisely if that's important to you.

Works awesome to regulate the air down for my Co2 laser. I but a valve right behind it and viola, perfect.

Bought this for my husky compressor. Have had problems with the 1/4” original and replacement not lasting long at all. Got this 3/8 “ to replace with. See what happens. Quality looks good!

Seems to be a good product. Will see how it stands up to every day use.

I'm impressed with the SNS AR4000-N04 air pressure regulator! It's a great choice for anyone who needs accurate control over air pressure in their projects. Here's what I particularly liked: Easy Adjustment: Setting the desired pressure is a breeze. Just pull up the knob and turn - simple! No complicated instructions or finicky controls. Precise Regulation: This regulator delivers consistent and precise pressure within the 0-150 PSI range. No more guessing or wasted time with imprecise adjustments. Built to Last: The aluminum alloy body feels solid and durable, giving confidence it will withstand regular use in my workshop. Ready to Use: The included bracket and gauge make setup a snap. Everything you need for installation is right in the box. Great Value: This regulator offers excellent performance at a competitive price. It's a smart investment for any workshop or industrial application. Overall, the SNS AR4000-N04 is a dependable air pressure regulator that's easy to use and built to last. Highly recommended!

This worked great !! I bought 2 others , one from Home Depot and another from Harbor Freight that didnt work at all . This valve could adjusted by lifting the knob and turning it til you reached the desired psi , then pushing the knob down (locking it) . The others were not true regulator valves . If you turned them to regulate the pressure they would let the air out of the compressor tank until it was at the pressure you desired , the only problem was that the compressor would then run non stop .

It seems to be well built and is easy to install. The instructions are in Japanese primarily, but also come with English as well. Reasonable price compared with other products that are similarly spec'd. I tested it multiple times without any leaks or issues. I have the psi set to 125 lbs. which is more than enough for what I'll need it for. e.g. tire inflation, air tools, plasma cutter etc.

Absolute junk. The Allen head screw on the bottom was leaking air. I tried to remove it so I could put some thread sealer on it and it was cross treated.

Good build quality

​サブタンクに空気圧調整機能を付けたくて購入しました。 思った通り、しっかりと正確に圧力調整ができるので満足しています。 ​注意点として、メーターなどの部品は自分で接続する仕様になっています。エア漏れを防ぐために、あらかじめシールテープを用意して組み立てるのがおすすめです。

Works as it should.

As described, appears to be a very good casting and good machining, it appears to be well worth the money. Only complaint is the gauge, it's threaded undersize and I couldn't use it as it would bottom out on the wrench flats before tightening up on the threads even using teflon tape. I ended up buying another guage, it was definitely the gauge that was machined wrong as I tried multiple fittings in the regulator and they fit well. I also tried the gauge in my old regulator and it would bottom out on that as well.

Ich nutze den Regulator für mein Wolverine Inferno Gen2 HPA System und die refreshrate ist sehr gut und ich nutze eine normale Flasche mit 850Psi Ausgang und 1/8 npt Adaptern. Bin sehr zufrieden.