A/C Oil and Dye Injector Refrigerant Tools 1/4" SAE Connector 2 OZ Hand Turn Screw with Snap Quick Coupler for R134A R410A R22 R12 System

This injecto is somewhat easy to use. Pour oil and die in after setting it to the ounces you want to inject. Screwing the cylinder out to desired setting is easy and quick. Screwing the cyclinder in to inject into a/c system can be somewhat straining. What I have found to make it easier: If replacing key components, especially after a system flush, inject oil after vacuum. Make sure you purge air out of the injector beforehand. Do this by propping the hose up and slowly twist the cylinder until you see oil or dye come out of the end, do this before connecting the coupling to it. I always run the vacuum pump for a few minutes on the low pressure side, just to make sure no air accidentally entered the system. I put my injector through a pressure test to see if the cylinder seals would leak, they did not. This tool is well constructed with clear ounce markings. It should last for many years. The seller also includes a spare o-ring.

Works Great, heavy duty feel

I had never used one of these and it worked just fine. Surprisingly beefy and I believe the calibrations are etched, but I personally would measure PAG oil with a graduated vessel or a digital kitchen scale like I use for R134A. Even as one of the cheapest around it was hard for me to spend the dough, but I'm glad I did. Just unscrew the top, place oil/dye in, bleed it by turning barrel while holding cap until a bit comes out and press it on the LP port & turn the rest of way down. I did so with system under vacuum as I think there is controversy over injecting with system pressurized. Don't mess with the bottom cap, it's not meant to come off.

I am a new to AC work and I was able to use this injector without any issues. Everybody talks about the quality which I fully agree. This is robust and will last for a long time. It also comes with parts needed in only rare circumstances. This shows that they really want to put customers first to make sure that they have parts needed. The cost is very low for what you get. It’s not worth it to buy a one time use oil can given this product. I do not regret buying it even though I don’t have another AC job planned.

Produce is made of good materials. Nice easy to use turn gauge. Haven’t used yet but don’t see any issues. Really like that it came with the adapter to use on my vehicles. 91 accord (r22) and Expiditon & crv (r134a).

good quality, but it is not easy to use.

Just make sure to bleed the air out before you put the coupler adapter on. Otherwise no issues on a R134A system.

Like it, easy to use. The price is good too.