McDonnell & Miller 51-S Feeder Refrigerant enabling technicians to mount the

enabling technicians to mount the head after the valve body is piped in

Natural Gas or 10" w

facilitating a straightforward installation on standard air handlers and evaporator coils

Designed for rugged field use with a focus on long-term switching reliability in varying ambient conditions

If the switch detects insufficient vacuum or a blocked vent

McDonnell & Miller 51-S Feeder Refrigerant enabling technicians to mount theThe McDonnell & Miller 51 S (Part Number 135600) is a heavy duty mechanical water feeder designed specifically for high capacity steam and hot water boilers. Engineered for systems with a maximum vessel pressure of 35 PSI and a maximum water supply pressure of 100 PSI, this unit provides a reliable proportional feed action to maintain optimal water levels without the hunting common in electronic setups. It features 1" NPT connections for high flow