Mcdonnell & Miller 42S-N, Combo Low Water Cut-Off - Pump Controller (Steam) w/ gauge glass connector

Specifications For residential, commercial, and industrial low and medium pressure steam boilers with a separate water column For boilers of any steaming capacity Monel bellows provides corrosion resistance Single pole, single throw snap action switches Enclosed junction box protects switches Gauge glass connector Maximum pressure 50 psi (3.5 kg/cm2)