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Can this be used on one-pipe steam systems
reducing mechanical noise and parasitic energy loss
If the switch "flutters" or loses contact mid-cycle
the 40003916-046 and the 40003916-046/U are functionally and physically identical
they are identical units
McDonnell & Miller RB-24E-S Control 30067439-890 Can this be used onThe McDonnell & Miller RB 24E S (Part Number 144693) is a heavy duty, 24VAC conductance type low water cut off designed specifically for residential hot water boiler applications. Engineered for reliability in the field, this unit features a 3 4" NPT connection with brass threads to ensure a secure, leak free metal to metal seal. The RB 24E S includes a specialized control board wiring harness, allowing for efficient "plug and play" integration with