This valve can be mounted in any orientation except with the actuator below the horizontal axis of the pipe to prevent moisture from damaging the drive motor

supporting domestic and international power standards

It operates on 24V AC low voltage systems and is fully compatible with millivolt heating applications

Engineered for compatibility

The Field Controls 46579100 is the current replacement part number for the older 46390008

McDonnell & Miller RB-24E-L Control 30067439-890 This valve can be mountedThe McDonnell & Miller RB 24E L (Part Number 144690) is a specialized residential low water cut off designed for 24V hot water boiler systems. This electronic LWCO utilizes a 3 4" NPT probe style sensing element to monitor for hazardous low water conditions, ensuring the burner circuit is interrupted before equipment damage occurs. Unlike manual reset models, this unit features an auto reset function that restores operation once the water level