Dayton 4X679 pressure switch is a replacement part for Dayton Speedaire equipment, with a 145–175 PSI operating range. It senses system pressure and actuates a connected circuit to control a compressor or other pneumatic equipment when the set pressure is reached. Designed to fit Dayton Speedaire systems that use the 4X679 control, this switch provides a direct, drop-in replacement to restore accurate pressure control within the specified range.
