Replacing a worn 221525 with this genuine Reznor heating part ensures the system maintains its original combustion efficiency and factory-spec safety parameters without the risks associated with universal aftermarket alternatives

Replacing a 175°F switch with a higher rating can lead to heat exchanger damage or fire hazards

always verify the technical specifications before substituting

Ensure the hub is seated on the flat portion of the shaft and the 1/2-inch bore is not loose

the A350SS-1 is an electronic reset module designed to calculate setpoints

Hydrolevel 250 Pump Controller Els PW 17895 Replacing a worn 221525 withThe Hydrolevel 45 250 (Safgard 250) is a heavy duty 120Vac combination pump controller and low water cut off engineered specifically for steam boiler applications with operating pressures up to 250 PSI. As a veteran preferred solution for maintaining precise boiler water level control, this unit utilizes EL1214 sensing probes and a durable manifold casting to manage the feed pump. By eliminating moving parts within the boiler water, it mitigates