Invensys Controls - Spa Mechanical Thermostat, 12in x 1/4in Capillary Bulb, SPDT

Invensys / Eaton Mears 275-3123 standard mechanical spa heater thermostat used on older spa pack control systems from Allied, Len Gordon, Brett Aqualine, PresAirTrol. Factory set, but adjustable spa thermostat has a 12"" capillary wire with a 3.6"" long x 1/4"" wide copper capillary bulb that is placed into a thermowell (not included). Thermostat is screwed to the back of the panel or heater housing, with the knob attachment pointing outward. SPDT wire connections are 1/4"" standard tabs. 275-3123 replaces or supersedes 180020001, 59B9031, 59B9282, 760077.