Best Air Couplers 1/4, Safety Couplers 

Ran my shop on Milton I/M for years. Now, my personal garage has Merlin I/M. Never had a problem. Great review!

Great testing as always, I run the legacy industrial fittings and a 3/8 hose does all I could ask of it!

Oh man, you're amazing. Thanks for this testing!!

Crazy there's so many different types. For those looking for a better quality standard coupling, Foster is made in USA. I bought a set of 14 couplers for only a couple dollars more than the Chinese junk. Been very impressed with them so far. Not sure if they make a safety version or not.

Interesting video, not seen any of those fittings for air system. We use either PCL or Schrader fittings, neither of them are safety locked, although there may be other types used in other industries in the UK.

Everything at my place of work is Lincoln. Been having a shitty time trying to find one for my own personal air sprayer for cleaning up my work area and getting tge dust off of me at the end of the day.

I'm not sure the test is completely accurate. It would be nice to see the results on the high flows if they were also installed on the compressor. I would think that the way you have it hooked up creates a bottleneck straight out of the tank without that being switched over. I have 1/2" or 3/8", I can't remember which one, out of my compressor and into my sand blasting cabinet as well as the 1/4" through a second valve. I run the 1/4" at a lower pressure so I don't ruin my power tools, and I keep the blast cabinet at 80 to 110 depending on what type of media I'm using and how much I need to clean off of any given piece. If you get a chance to switch that out, I would really find that helpful, even if you just put the results in this comment section instead of a whole new video.

Unless you have an older Merlin safety coupler mine will take the HF male.

That’s odd, I’m running HF with both Merlin and Milton safety couplers

What you recommend for home use (tires, car and bikes, maybe the occasional air wrench for car lugs and small amounts of media blasting, right now I just use the 1/4” HF plugs and couplers with 3/8 air line

We need some independent tests on the safety coupler made by American manufacturer Stedlin.

The Milton coupler you have linked says made in USA on the listing

Why did u leave out Oetiker swing couplings?

Which flowmeter is that?