Features and Benefits of the McDonnell & Miller Series 42S

• 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)