So I've got a 3 gallon FreshKegRR from a local brewery and I realize I have no idea how to go about tapping it, as the Co2 is in a compartment at the top of the keg and I'm just used to using picnic pumps. Anyone have easy instructions on how to tap so I don't screw anything up? It's a faucet tap with a D system keg coupler, no external regulator or anything. This might be a stupid question, but any help would be appreciated.