A new installation tag must be attached, in addition to the existing installation tag, each more than __ sprinkler heads are added to a system.

• A. 30
• B. 20
• C. 40
• D. 10

Answer: (B)

When you expand a sprinkler system, you must update the documentation to reflect the new configuration. The installation tag shows the system’s original approval, and a second installation tag is required whenever additions reach a defined level of change. That threshold is set so that only meaningful expansions trigger extra paperwork, ensuring the design calculations and inspections stay aligned with the actual system. In practice, this means you attach a new tag to record the modification once the added heads cross that defined level. This helps inspectors verify that the updated coverage meets the required standards.