Patent ID: 8464818

Claim:
A fuel system comprising a plurality of fuel storages; filling piping that connects the fuel storages in parallel to a filling port to be connected to a fuel gas filling apparatus; and supply piping that connects the fuel storages to a fuel supply destination in parallel, the fuel system further comprising: an integral manifold, which comprises a filling manifold part that is integrated with a supply manifold part, wherein the filling manifold part is at a branch point in the filling piping, and serves as the interconnection between a common filling pipe that extends from said filling port and a plurality of separate filling pipes that extend to the respective associated fuel storages; and the integral manifold further comprising a filling flow channel that connects said common filling pipe to said separate filling pipes; wherein the supply manifold part is at a branch point in the supply piping, and serves as the interconnection between a common supply pipe that extends from said fuel supply destination and a plurality of separate supply pipes that extend to the respective associated fuel storages; and the integral manifold further comprising a supply flow channel that connects said common supply pipe to said separate supply pipes; the integral manifold further comprising: a communication flow channel that connects said filling flow channel and said supply flow channel to each other; a valve for opening and closing said communication flow channel, and a leak checking port configured to allow introduction of a fluid for leak checking into said filling piping and said supply piping, and when fluid is introduced into said leak checking port with the valve opened, the fluid flows into said filling flow channel and said supply flow channel.