So you had the great Foresight to buy one of our modular gas line manifold and now you are adding a keg. You need gas on that keg. No problem, use our add on assembly to expand your existing manifold. Includes a shut off with check valve, one tee and a connecting nipple. Make sure the gas is off and depressurized. Swap the plug from your manifold into the add-on and mount the add-on where the plug was. Voila!