I wanted to add an option for 1/2 inch valve users because I wasn't quite sure how to do it. I was upgrading the cooler and already had the parts.
I got all this stuff at a local hardware so I'll do my best listing the items,
1/2 inch Brass ball valve
3 -Stainless Steel Washers that happen to fit into the plastic molded hole of the cooler.
2- rubber o rings
Brass coupler which I intend to replace with a shorter steel one.
Everything put together
See what I mean about the ss washers, cool huh
Tested it with 8 gallons of water for an hour, no leak