Why is it important to have a stock of spare heads at the sprinkler controls?

by Nils Deacon, Manager, Inspections and Rating Services

Automatic sprinkler heads are the delivery points of the sprinkler system to deliver water onto a fire. If they have activated previously or become damaged, they should be replaced according to NFPA 13, Chapter 6.

A minimum of six spare heads are required and should correspond to all types and ratings of the heads on the system. Additionally, a sprinkler wrench should be located in the cabinet for quick removal of old heads and replacement with the new ones.

Six spare heads are required when there are less than 300 on the system. For larger systems, of up to 600 heads, 12 are required. Over 1,000 heads in a facility would require at least 24 sprinklers.

DISCLAIMER: This information reflects the interpretation of MSO, Inc. with regard to NFPA Standards and Codes. It does not represent NFPA’s official position on the items discussed.

Spare sprinkler heads and wrench in a sprinkler cabinet.