Fusible links of metal alloy type and automatic sprinklers of metal alloy type shall be replaced at least ____________ except as permitted by 11.2.6 and 11.2.7.

• A. Monthly
• B. Quarterly
• C. Semiannually
• D. Annually

Answer: (C)

Regular replacement of fusible links and metal alloy sprinklers is required to maintain reliable heat-sensing and release in the system. These components are prone to aging, corrosion, and buildup from use, which can dull their response or prevent activation when needed. A semiannual replacement interval keeps the risk of degraded performance low while balancing practical maintenance workload. The referenced sections allow for exceptions or alternate schedules under specific conditions, so an AHJ-approved variation or manufacturer guidance can apply if those provisions are met. The other options would either be too frequent, wasting resources, or too infrequent, increasing the chance of a failure to operate when heat is present.