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Herga PresAirTrol Side Spout Spa Pump Air Switch, SPDT, 21A, 2 HP at 250 VAC, 1 HP at 125 VAC, ARA111A is an air operated switch used on older hot tubs and spas, to activate hot tub pumps. PresAirTrol SPDT switch is single pole, double throw, with a micro switch and a dummy switch. Latching switch holds the onoff position until air button is pushed again. 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. Made by PresAir, this air switch replaces and supersedes 6861 AOO U106. Connects with 18 air hose, sold separately, which attaches on the side also available in center mount. Hergair PresAir air switch ARA111A mounts with self tapping screws.
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