McDonnell & Miller 61 Low Water Cut Off 30067439-890 Built to withstand high-duty cycles

Built to withstand high-duty cycles

facilitating a complete rebuild of the lower head mechanism

Automatic Reset Functionality: Restores continuity once temperatures drop to 130°F

This switch is rated for a maximum supply pressure of 30 psig

McDonnell & Miller 61 Low Water Cut Off 30067439-890 Built to withstand high-duty cyclesThe McDonnell & Miller 61 Low Water Cut Off (Part Number 140100) is a heavy duty mechanical control designed for residential steam boiler applications. Engineered for systems with a 20 PSI maximum steam pressure, this float operated safety device prevents catastrophic boiler failure by interrupting the electrical circuit if the water level drops below the safe operating line. The unit features 1" NPT connections for a secure fit into the water column