I got it from my sister on a reg set she gave me and I have no idea where she got it from. Yes, it goes onto a regular hose. I have hunted for a similar fitting with no success. Piranha has this, it is reverse of mine but might work as well or better:Where did you get that? And does it go on a regulator hose?
"Y" Adapter Low Pressure
Use this Y adapter when you need to run low pressure hoses on your rig This "Y" adapter has the following connection: Quick Disconnect end that fits onto your standard power inflator connection "1" low pressure hose connections
www.piranhadivemfg.com
James