Fire Lite DST3 InnovairFlex Sampling Tube 3 Inches With Holes

Fire Lite DST3 InnovairFlex Sampling Tube 3 Inches With Holes. The sampling tube end cap, included with the detector, is critical to the proper operation of the duct smoke detector. The end cap is needed to create the proper airflow to the sensor of the duct smoke detector. Once any sampling tube length adjustments are made, plug the end of the sampling tube with the provided end cap. A plastic exhaust tube is included with the unit to be installed if needed. Install the housing connection that is downstream from the sampling tube connection. The exhaust tube can be installed from the front or back of the detector. A longer 1-foot exhaust tube, model ETX, is available as an accessory in cases where the molded exhaust tube does not extend at least 2 inches into the duct.