How often should dry sprinkler heads be tested?

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Dry sprinkler heads are treated as highly reliable components, so the testing approach focuses on the overall system and regular inspections rather than pulling and testing every head each year. In many training standards, you perform a thorough head-related check on a representative sample only every ten years, while continuing routine visual inspections and annual system tests to catch any obvious damage, corrosion, or obstructions.

The reason this interval is best is that it minimizes system disruption and potential accidental discharge from frequent head testing, yet still provides a periodic, comprehensive check to confirm that heads would respond as intended when the system operates. Between ten-year checks, you keep up with regular maintenance of the piping, valves, alarms, and a visual survey of all heads to ensure they’re not blocked or damaged.

Other intervals would either impose unnecessary disturbance and risk (testing heads too often) or miss longer-term changes that could affect performance (testing too infrequently).