These gas manifolds are rated to 100psi and include 3 gas line outputs and 3 x 1/4inch ball vales with MFL thread. We highly recommend using the KL06880 - duotight FFL x 8mm push in fittings for these manifolds. As seen in the photos. This unit can be turned into a 4 way manifold by adding a 1/4 inch ball valve (part *coming soon*) You can also attach a Gas Ball Lock Post with 1/4 Inch Bulkhead Assembly (part KL03179) if you want to be able to easily disconnect/reconnect a gas line. Alternatively you can also fit the Duotight 8mm to 1/4" push in fittings to this manifold KL06897. But this would defeat the purpose of having the check valve built in, as well as having the ability to isolate each gas line. Lastly if you want to join multiple manifolds together you can do this using the stainless hex nipple (KL06439) Please note that due to the check valve mechanism there is about a 2 psi pressure drop over the ball valves in these manifolds. You will need to set the pressure on the regulator about 2 psi higher than the desired pressure in the keg. This has been superseded by the 2 way manifold on which you can add an additional 1/4" ball valve.