[Doghouse]

I was diving a gentleman's boat today, and he said the he used to dive and would like to give me some stuff. So heck like I am going to say no...

Well he brought up 3 tank valves. 2 singles, and 1 double.

Now being still a little young in diving, I thought these were a little wierd as there is a switch on one side. I presume that these are J-valves, am I correct?

Are they still worth using?

Thanks for the input.