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NOTE: This is an unformatted excerpt from our online fire protection training library.

Automatic Sprinkler Inspection, Testing & Maintenance

Automatic sprinkler heads

Automatic sprinklers must be tested when they have been in service for a specific number of years. The testing consists of submitting a representative sample of sprinkler heads to a nationally recognized testing laboratory. If testing verifies that the sprinklers still perform as intended, they may remain in service. A representative sample is a minimum of 4 sprinklers or 1 percent of the installed heads, whichever is greater. If a single sprinkler head fails the test, all heads must be replaced.

The test frequency varies with the type of sprinkler head.
Ordinary sprinklers must be tested after 50 years and at 10 year intervals after that. Sprinklers in service for 75 years or more must be tested at five year intervals. Automatic sprinklers manufactured before 1920 must be replaced. Quick response sprinkler heads must be test after 20 years of service, and then tested at 10 year intervals. Extra high temperature [325° F (163° C)] or greater that are exposed to the maximum permitted ambient temperature, must be tested every five years.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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