Presair - Magictrol Air Switch, 3PDT, 21A, Black Cam, Threaded 9/16, MTK311A

PresAirTrol Magictrol 3PDT air switch MTK311A is a 4-function air switch with a BLACK colored internal cam and 1/8"" THREADED center spout air hose connection, with lock nut ring. 1HP at 125 VAC, or 2HP at 250 VAC. This sequential or sequencing air switch is a mechanical stepper switch that can be used to control up to 4 devices. Each time the air button is pushed, a stepping cam is rotated 3 or 4 positions to actuate micro switches. Used on an air actuated spa control system. Magictrol air switches are recommended for air hose runs of less than 15 ft, or under 4.5 meters. 3 sets of 3 wire terminal connections on this general hot tub air switch - common (always used), NO normally open (usually used) and NC normally closed (not normally used). Connects with 1/8"" air hose, sold separately.