This Rheem Marathon Upper-Element Thermostat is specifically designed to be used as the upper thermostat in a Rheem Marathon residential electric water heater. These water heaters often have a "non-simultaneous" design, which means that only 1 heating element is on at any given time. This type of thermostat is for use in 2-element water heaters.
Fits Rheem Marathon residential water heaters only
For use in 2-element Marathon water heaters
Temperature-sensitive bi-metal disc delivers snap action to the contacts
Speed and force of contact separation provide a long-lasting, dependable performance at high electrical loads