Manifolds are used extensively throughout the oil and gas industry for the distribution of gases and fluids. They are designed to converge multiple junctions into a single channel or diverge a single channel into multiple junctions.
A manifold is a system of headers and branched piping that can be used to gather or distribute fluids, as desired. Typically manifolds include valves for controlling the on/off flow of fluids, and may also include other flow control devices (e.g. chokes) if these are not mounted on the individual subsea trees.