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McDonnell & Miller 67 Low Water Cut Off 30067439-890 What is the maximum glycolThe McDonnell & Miller 67 Low Water Cut Off (Part Number 149400) is a mechanical float operated control engineered for reliable steam boiler protection in residential and commercial applications. Designed for a maximum pressure of 20 PSI, this auto reset unit features quick hook up fittings for efficient installation directly into gauge glass tappings. The 3 4" NPT connection and large float chamber facilitate stable operation, while dual 120V
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