The Jetstream nozzle seat ring is for Hot Spring 1991-1993, 1997-current, and Tiger River 1992-1993, 1997-current.
The Jetstream is a powerful jet that combines the pressure of several jets into a substantial stream. The Jetstream is located in the footwell of the spa to provide a massage to the feet and the calves.
The air control valve is used to control the intensity of the Jetstream. To adjust the intensity, turn the air control lever clockwise to increase the intensity (air) or counter-clockwise to decrease the intensity (air).