Gas ManifoldOur specially designed CO2 gas manifold is designed to attach directly to the 1. 5" TC port on your fermenter's lid. This manifold allows you to easily add pressure for transfers, stuck yeast dumps, purging oxygen, carbonating, etc. The manifold has 3 ports for a pressure gauge, pressure relief valve and a ball lock gas post. One part, three functions, easy assembly, easy cleaning; what more could you ask for!? Gas Manifold Only: 3 Port Gas Manifold