This 3/4-inch calibrated pressure relief valve is specifically designed to manage excessive pressure in systems carrying water

This specific 21 series set typically includes the top and bottom valves

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

making it compatible with high-volume brewers like the Curtis Alpha Series

supporting domestic and international power standards

McDonnell & Miller RB-24E-L Control 30067439-890 This 3/4-inch calibrated pressure reliefThe 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