Air valve help

I am looking for an air valve but don't know what it's called, or if it exists. I want to air up a bladder by opening the valve (attached to my air compressor), stop the air flow when it is as full as I want, and then drain the air out using the same valve. I'm thinking some sort of a ball valve. One that is easily actuated.

Anybody know of such a thing?

Where is it to be installed? We need a little more information at what the goal is. That sounds like a check valve that are stock on any tube you pull behind the boat or any inflatable you would put in a pool.

Nothing boat related. This is more light duty construction related. I want to fill a bladder with air for light duty (100-200 lbs) lifting, then dump the air to deflate the bladder. I need to be able to do this easily without bending over or using any other tools to deflate. I think a valve used to drain compressors would work, coupled to a ball valve, but I am wondering if there is some sort of valve that would fill, then deflate.

Thanks for any input.

If you had a Tee with two ball valves than you could turn off inlet air and open for vent and vise versa on the fill. There is a good chance something existing already but I a tee and two ball valves is cheap, easy and fast

sounds like some braided hose and valves will do what you need

I didn't think of a T and 2 valves. I was thinking a T and a blow off valve with a manual pull ring like the ones on an air compressor. Two ball valves will be much cheaper.

Thanks guys, I appreciate it.

3 way ball valve