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    Code Requirement 4 min read

    How Often Do Fire Sprinklers Need Inspection in Oklahoma?

    Fire sprinkler systems save lives and property, but only if they're inspected and tested on schedule. NFPA 25 defines the required intervals for commercial properties in Oklahoma. Here's a clear breakdown.

    Quarterly sprinkler inspections

    Every quarter, a licensed technician visually inspects control valves, tamper switches, alarm devices, and fire department connections. These are visual checks — no water is discharged.

    Quarterly inspections catch problems like closed valves, missing FDC caps, and obstructed access before they become serious impairments.

    Annual sprinkler testing

    Annually, the technician performs a main drain test (verifying water supply pressure and flow), a waterflow alarm test (confirming the alarm activates), and a full visual inspection of all sprinkler heads.

    These tests physically exercise the system and produce the documentation your fire marshal and insurance carrier require.

    5-year internal inspection

    Every 5 years, NFPA 25 requires an internal inspection of piping and a sprinkler head sample to check for corrosion, obstruction, and debris. This is a more invasive inspection that may require opening selected pipe sections.

    Oklahoma enforces this 5-year requirement, and it must be documented like all other NFPA 25 tests.

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