Surface Mount Aquastat 120 to 180 F, 59T 4200 Therm-o-Disc Therm-O Disc - 59T 4200 Thermostat lower, surface mount, manual reset 120°-180° F, some wood furnaces use this turning on fans or pumps, 120 VAC. This is the A...

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Surface Mount Aquastat 120 to 180 F, 59T 4200 Therm-o-Disc Therm-O Disc - 59T 4200 Thermostat lower, surface mount, manual reset 120°-180° F, some wood furnaces use this turning on fans or pumps, 120 VAC. This is the Aquastat is used mainly on Domestic Hot Water tanks and comes on the Back of the Shaver Outdoor Furnace