Quick Disconnect Not Working

[LawFox32]

ok I have bought a fill station for filling off of a scuba tank and the disconnect that attaches the tank to the fill adapter, does not connect, well it doesn't lock because if you turn on the valve of the scuba tank all the air just shoots out around the q/d's, any help will be appreciated, thanx

[BlackVCG]

Some fill nipples, especially the AGD ones don't like to fit into cheap female quick disconnects. Try a different fill nipple or female QD piece.

[Blennidae]

Is the O-ring in the female part missing?

[LawFox32]

where is the o-ring on the female q/d??

[PyRo]

Just look into the q/d. You should see an o-ring, you might need a light.