When replacing sprinklers in an NFPA 13 R system, what is the guideline regarding the type of sprinklers to use?

In an NFPA 13R system, the guideline stipulates that only new sprinklers must be used when replacing existing units. This requirement ensures that the sprinklers deployed in a fire protection system meet current safety standards and are free from wear or damage that could compromise their effectiveness. New sprinklers are also tested and certified to perform according to the necessary specifications, which includes flow rates, temperature ratings, and responsiveness to heat.

Using only new sprinklers helps guarantee consistent performance and reliability of the fire suppression system, which is critical in ensuring occupant safety and effective fire control. In contrast, options that involve using old or repaired sprinklers may pose risks, as they could have undetected damage or reduced performance capabilities. Additionally, mixing brands could lead to inconsistencies in operation and performance under emergency conditions. Therefore, adhering to the guideline of using only new sprinklers is vital for maintaining the integrity and compliance of an NFPA 13R system.