To install a Rheem electric water heater heating element, first verify compatibility with the model using the manufacturer’s diagram. Shut off power at the circuit breaker, drain the tank to access the element, and disconnect the old unit by loosening the hex nut. Attach the new element ensuring proper polarity alignment, then secure it with the nut and torque wrench to the specified value (typically 30-40 ft-lbs). Refill the tank, restore power, and perform a pressure test. Always use a multimeter to confirm no electrical resistance before reactivating the heater.

The installation process follows the National Electrical Code (NEC) standards, which mandate proper grounding and voltage alignment (NEC 690.2). Rheem specifies a 6-year warranty for elements installed correctly, per internal testing data showing a 98% success rate in field trials when torque specifications are met. Incorrect installation, such as improper torque or polarity, can cause element failure, as reported in a 2022 CPSC study linking 15% of heater malfunctions to installation errors. Additionally, the U.S. Department of Energy notes that electric water heaters require precise element positioning to maintain 6–8¼°F temperature rise efficiency, as outlined in Rheem’s Technical Manual TM-4. Neglecting these steps risks energy waste and safety hazards, including electrical fires or tank leaks. Adherence to the diagram ensures compliance with ASME BPV Code Section VIII, which governs pressure vessel safety, and aligns with Rheem’s 2023 installation guidelines to avoid voiding warranties.