Reliance Upper Electric Water Heater Thermostat for 2-Element Models (WH10-A) is specifically designed to replace thermostats on most residential electric water heaters, including model No. WH-8. This thermostat is factory set at 120° F but adjustable settings ranging from 110° F to 160° F, allowing you to customize the water temperature to your preference. It features a Safety Energy Cut Off (E.C.O.) that automatically cuts power to the heater if the internal tank temperature reaches 190° F, ensuring reliable protection and safety. Both the thermostat and the E.C.O. are UL listed, ing quality and compliance with safety standards. This unit is compatible with water heaters that use Apcom, Robertshaw, and Therm-O-Disc thermostats, making it a versatile and dependable part. Model Number: 100108684