McDonnell & Miller 64-A Low Water Cut Off Freon and 430 series units

and 430 series units

If the electrical signal is present

the 63A10 provides the durability expected by veteran contractors performing field service on residential and light commercial equipment

and steam systems using standard globe valve bodies

Each unit undergoes rigorous factory testing to verify electrical integrity and mechanical performance

McDonnell & Miller 64-A Low Water Cut Off Freon and 430 series unitsThe McDonnell & Miller 64 A (Part Number 143700) is a heavy duty, mechanical low water cut off engineered specifically for residential or commercial hot water and steam boilers. Designed with 1" NPT quick hook up fittings, this unit simplifies installation into gauge glass tappings, facilitating proper water level monitoring without extensive repiping. Built to handle a 50 PSI maximum boiler pressure, the 64 A utilizes an automatic reset mechanism to