use a 7/8" hex socket and tighten to 50-60 ft-lbs

Whether you are addressing a Honeywell T921 replacement knob request or a standard maintenance call

Universal Compliance: Meets ASME B16

including field-installed kits

This usually indicates a failed thermistor bead or a break in the lead wire

Rheem-Ruud SP6379M Thermocouple use a 7/8" hex socketThe Rheem Ruud SP6379M 19 inch Thermocouple is a critical safety component designed for precise millivolt signal generation in residential gas water heaters. As a high performance pilot safety device, this copper jacketed thermocouple ensures the gas valve remains open only when a consistent pilot flame is detected, preventing hazardous unburned gas accumulation. This OEM certified part is the direct replacement for SP6379E and SP6379K, engineered for