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Precise Fitment: Ensures perfect alignment and bolt-load distribution across the gas valve manifold surface
it facilitates durability in demanding thermal conditions with a maximum temperature service of 312°F
This model comes in a UL Type 1 indoor plastic enclosure
preventing premature cycling or coil burnout
McDonnell & Miller 53-HD Control Els PW 17895 Precise Fitment: Ensures perfect alignmentUpgrade 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