EIGHT-WAY VALVE

An eight-way valve including a housing and a rotary member is provided. The housing includes an annular wall, a first chamber, a second chamber, a third chamber, and a fourth chamber. The annular wall is provided with 16 upper-tier openings and 16 lower-tier openings. The rotary member includes an upper-tier switching part configured to switch between opening and closing of each of the 16 upper-tier openings, and a lower-tier switching part configured to switch between opening and closing of each of the 16 lower-tier openings. The upper-tier switching part includes an upper-tier first communication passage, an upper-tier second communication passage, and an upper-tier closing part, and the lower-tier switching part includes a lower-tier first communication passage, a lower-tier second communication passage, and a lower-tier closing part. Any one of a first space to an eighth space is respectively provided with a port.