NFPA 25 Inspection Guidance for Dry and Pre-Action Sprinkler Systems
A requirement of NFPA 25, 14.2 (the standard for fire sprinkler inspections) is that every three years you are required to do the following:
- Every three years and whenever the system is altered, the dry pipe valve or pre-action valve shall be trip tested with the valve fully open and the quick opening device, if provided, in service.
- The time required for water to pass through the inspectors test shall be measured and recorded.
- The system shall be left with pressurized water long enough for leaks (if any) to be determined.
- All low points in the system shall be drained.
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