What is the minimum stock of spare sprinklers that shall be maintained on the premises for sprinkler systems having less than 300 sprinklers?

• A. 4
• B. 6
• C. 8
• D. 10

Answer: (B)

Spare sprinklers are kept on site so you can replace heads quickly during maintenance or after inspections without waiting for deliveries. The amount you keep is tied to how many sprinklers are installed in the system: smaller installations require a modest buffer—enough to cover typical replacement needs but not so much that storage becomes wasteful. If you keep too few, replacements can delay service; if you keep too many, you’re tying up money and space for little benefit on a smaller system. The guideline for systems with fewer than 300 sprinklers calls for a moderate stock that fits those practical needs, which is why this option is the best fit. (Spare heads should match the installed type and rating and be stored in a readily accessible location.)