ensuring the operator can investigate the root cause of the pressure spike

and specific series of Lochinvar Copper-Fin boilers

the DCL164S is compatible with HCFC

the 18J96 is engineered for CCWLE rotation (Counter-Clockwise Lead End) to match standard Lennox blower wheel orientations

a certified OPD is required to meet ANSI Z21

McDonnell & Miller 53-HD Control 30067439-890 ensuring the operator can investigateUpgrade or restore your boiler's mechanical water feeder with the McDonnell & Miller 53 HD Head Mechanism. Designed specifically for low pressure steam and hot water boilers, this heavy duty Series 53 replacement part (Part Number 137000) provides proportional feed action to maintain safe water levels in systems larger than 5,000 sq. ft. As a head mechanism only, this unit allows for a direct swap onto your existing float chamber without needing to