This thermostat is for Beachcomber Hot Tub Models with Older Mechanical Systems (1997 hot tubs, mechanical hot tubs and 320M/320XM hot tubs).
Eaton 12", Pilot Duty Full Rated
12"X1/4" CAP
5.88" BUL
Mechanical thermostats utilize a copper sensor bulb attached to the thermostat body with a copper capillary to measure temperature. The body of the thermostat has rotating dial either located either the side or the top of the unit. This dial is used to raise or lower water temperature to a desired level.