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Each MARS 34604 kit is a comprehensive heating element replacement package
The 1/8" NPT center back connection enables seamless stem mounting into terminal equipment or pneumatic control panels
The Robertshaw 1950-001 Thermopile
supporting both sequences
The most common cause of failure is debris fouling the valve seat or a damaged float
McDonnell & Miller 51-2 Feeder Els PW 29614 Each MARS 34604 kit isThe McDonnell & Miller 51 2 (Part Number 135000) is a heavy duty mechanical water feeder and low water cut off (LWCO) designed for industrial and commercial low pressure steam and hot water boilers. Engineered for systems with a capacity exceeding 5,000 sq. ft., this unit provides critical protection by maintaining a consistent minimum safe water level regardless of electrical status. It features 1" NPT female connections and a snap acting SPDT switch