To provide a piping unit facilitating installation works, the piping unit, which does not increase a piping space, and the piping unit, in which there is no risk of the generation of a leakage of water.
The piping unit 10 contains at least one pipe joint 11. The pipe joint has a pair of main pipe sections 18, 20 and a branch pipe section 22 connected to one of both main pipe sections and crossed over the other main pipe section, and at least one of the other main pipe section and the branch pipe section has narrow flow passage sections 36, 38 at a crossed section. The piping unit further comprises a pair of main pipes 12 connected to either one main pipe section of the pipe joint, a pair of the other main pipes 13 connected to the other main pipe section and a branch pipe 14 connected to the branch pipe section 22.
TAKAGI TOMOYA
FUJIWARA TAKAO
HIRABAYASHI HIDEO
NIPPON KOKAN KK