What is the purpose of extending piping beyond the last nozzle by 2 inches in a branch line?

• A. To prevent clogging
• B. To minimize weight
• C. To reduce cost
• D. To accommodate expansion

Answer: (A)

Extending the piping beyond the last nozzle by a short length provides a small straight tail that helps keep the end of the line clean and serviceable. When the system is installed and during testing or maintenance, debris, burrs, or small particles can be present in the piping. The extra couple inches gives a location where you can purge or flush the line more effectively, carrying contaminants away from the nozzle rather than letting them accumulate right at the last outlet. This reduces the chance of the nozzle becoming obstructed and maintains reliable discharge. It isn’t about weight, cost, or accommodating expansion—the goal is to minimize clogging and ensure clean, unobstructed flow to all nozzles.