McDonnell & Miller model number 569 is a float-operated low water cut-off for mounting into 2-1/2" side tappings on steam boilers. This cut-off features dual 120 volt switches for low water cut-off and alarm or electric water feeder. Its maximum pressure is 20 psi and it has an insertion length of 1-3/4" with a 1/4" plug.
McDonnell & Miller, a unit of ITT Industries, is a leader in engineering and manufacturing boiler controls, liquid level controls, low-water cutoffs, and flow switches for steam and hot water boilers in industrial, commercial, and building trade applications. McDonnell & Miller specializes particularly in boiler controls and power switches.