the E9-16 is technically identical to and interchangeable with HK-E9-16 and HKN-E9-16 part numbers

The Johnson Controls D-251-6003 is a high-performance replacement diaphragm specifically engineered for pneumatic actuator maintenance and repair

The 100165930 is the updated Lochinvar flame sensor part number for the older PLT3022 designation

For liquid lines

offering a high load-bearing capacity and sustained performance under the high-torque conditions typically found in Rheem and Ruud units

Lochinvar & A.O. Smith 100163257 Bypass Assembly 322056-301 the E9-16 is technically identicalThe Lochinvar & A. O. Smith 100163257 Bypass Assembly is a critical OEM component engineered for precise flow management in high efficiency pool and spa heating systems. Built to withstand the rigorous demands of commercial and residential hydronic applications, this 1 2" NPT bypass kit ensures optimal heat exchanger performance by regulating water velocity and preventing thermal shock. This assembly is a direct replacement part designed specifically