Supplies:
Haze Wrench
Teflon Tape
Haze Juice
(The regulator is the thing with the two gauges.)
Remove old tank & replace with new tank.
Remove plastic cover on new tank & wrap threads with Teflon tape in a CLOCKWISE direction.
This will help seal the regulator to the CO2 tank.
(Pro Tip: If you are having trouble getting the threads to bite, push the regulator tight to the tank and spin the nut on the regulator counter-clockwise until you feel it "jump" in. Then start turning clock-wise.)
STOP! Listen closely for any leaks. It'll sound like hissing. If you hear hissing, close the CO2 tank and start back at step 3.