McDonnell & Miller Series 42S Low Water Cut-off/Pump Controllers, Quick Hook Up Fittings, 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 snap action switches. Enclosed junction box protects switches. Optional features – Quick hook-up fittings – Gauge glass connector. Maximum pressure 50 psi (3. 5 kg/cm2). Made in the USA.