Eaton - Spa Mechanical Thermostat, 48in x 5/16in Capillary Bulb, SPDT

Fits Patrol and AquaSet spa heater controls, with 3 wire terminals. Invensys / Eaton Mears 275-3317 with 5/16"" diameter capillary bulb, is a 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 48"" capillary wire insulated in vinyl, and a 4.0"" long x 5/16"" 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. Has 3-wire terminals, and rated to 25 amps.