Rheem Water Heater Parts SP20166B Water Heater Gas Control ThermostatThe Water Heater Gas Control ThermostatSP20166Bis a trusted replacement part for natural gas (NG) water heaters. This essential Rheem component helps regulate temperature for consistent hot water, safer operation, and improved energy efficiency. Designed as a precise thermostat replacement for compatible Rheem units, the SP20166B gas control thermostat coordinates with the gas valve to maintain safe operation and reduce standby losses. Built to endure

Its SPDT configuration enables switching between two circuits

while a compact 5

Applications: Oil-fired and hydronic heating systems

reliable component for flame-monitor burner management control systems

The regulator features an integral vent-limiting orifice as the breather hole and a compact form factor (1

6/3 VA driving power

this air press supports consistent performance across varying workloads and keeps up with demanding tasks

Line voltages: 125/250/277 VAC

Choose the V135A1006 for dependable performance

Key specs at a glance support easy integration into your hydronic system:

built to withstand typical residential or commercial environments

With a precise fit to the factory mounting points