As a 120V AC component

Utilizing a robust snap-action mechanism

use a multimeter to check the terminals

Common Questions What happens if the limit switch fails to reset

McDonnell & Miller RB-24E-S Control Els PW 17895 As a 120V AC componentThe 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