Mcdonnell & Miller 42S, Combo Low Water Cut-Off - Pump Controller (Steam)

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 mercury switches Enclosed junction box protects switches Optional features - Quick hook-up fittings - Gauge glass connector - BSPT threads Maximum pressure 50 psi (3.5 kg/cm2)