System Sensor WFD 60 Water Flow Detector – 6 Inch

System Sensor WFD 60 Water Flow Detector ? 6 Inch shall be installed on system piping as designated on the drawing and/or as specified herein. The detector shall respond to water flow in the specified direction after a preset time delay that is field adjustable. The delay mechanism shall be a sealed mechanical pneumatic unit with a visual indication of actuation. Detectors shall mount on any clear pipe span of the appropriate nominal size, either a vertical upflow or horizontal run.