SZRKRLA Paintball Co2 Tank Adapter Compressed Air Fill Station Remote Switch ASA Adapter with 3000psi Gauge Black

Good quality and well built, did not use it for it's intended purpose but it worked for me

But first I had to figure out how to use it. I thought the knob on top was a valve, but it works opposite as you would expect. Clockwise opens up the valve on the tank and counterclockwise, closes the valve on the tank. You use the bleeder valve on your compressor to release the pressure from the hose after you close the valve on the tank. Then you can unscrew the adapter off your tank with no air loss. I did it wrong a number of times before I figured out what I was doing. Update: I discovered something else. It seems you don't actually have to turn the knob on the top and open the valve on the tank to fill it. It seems the high pressure of the pump will automatically go into the tank and go through the closed valve. I'm going to have to experiment and see if opening the valve allows a little more pressure into the tank.

Arrived in one piece and no issues. Thanks

This is the second one I ordered and same issue no 8mm fitting or a hole to thread one in. Return in progress but do i dare try again. Third time lucky????

works great