Where must the label 'Smoke Detector Sampling Tube - Do Not Disturb' be placed on air sampling piping?

Where must the label 'Smoke Detector Sampling Tube - Do Not Disturb' be placed on air sampling piping?

• A. On both sides of penetrations through partitions
• B. At changes in direction or branches
• C. Along runs of pipe no more than 20 ft apart
• D. All of the above

Answer: (D)

The idea behind labeling is to keep the air-sampling path clearly identified and protected from being disturbed. Placing the label on both sides of penetrations through partitions alerts anyone approaching from either side that a sampling tube runs through that space and must not be obstructed. Marking at changes in direction or branches highlights spots where the tube could be kinked or altered and needs careful handling. Spacing labels no more than about 20 feet apart ensures there’s always a warning nearby so maintenance or construction work doesn’t inadvertently disturb or block the tube. When these locations are labeled, the sampling system stays clear and ready to accurately draw air for detection. That’s why the best practice is to label at all of these spots.

The idea behind labeling is to keep the air-sampling path clearly identified and protected from being disturbed. Placing the label on both sides of penetrations through partitions alerts anyone approaching from either side that a sampling tube runs through that space and must not be obstructed. Marking at changes in direction or branches highlights spots where the tube could be kinked or altered and needs careful handling. Spacing labels no more than about 20 feet apart ensures there’s always a warning nearby so maintenance or construction work doesn’t inadvertently disturb or block the tube. When these locations are labeled, the sampling system stays clear and ready to accurately draw air for detection. That’s why the best practice is to label at all of these spots.