Final answer:
Facilities with 301-1000 sprinklers need 6 spare sprinklers available for safety compliance and adequate fire protection.
Step-by-step explanation:
Facilities with 301-1000 sprinklers require 6 spare sprinklers to be available. This requirement is set to ensure that in case of malfunction or during regular maintenance, there are enough spare sprinklers to replace any that are defective or inoperable. It is important for safety compliance and to ensure adequate fire protection in the facility. The number of spare sprinklers needed increases with the number of installed sprinklers to maintain a proportionate level of readiness for emergency replacements.