ES&H Manual

Fire Protection Supplement


Chapter 4: Fire Protection System

Inspection, Testing, and Maintenance Procedure




Appendix 11:

Procedure for Testing

Full-Flow Trip Test of Preaction Water Sprinkler System




1.0             Purpose


Improper priming water levels can adversely affect the operation of supervisory air within preaction water sprinkler systems. This document provides a procedure to conduct a full-flow trip test of a pre-action water sprinkler system, which is required by NFPA 25: Standard for the Inspection, Testing, and Maintenance of Water Based Fire Protection Systems, 2017 Edition, Chapter 13, Section


2.0             Scope


This test will be performed on each preaction water sprinkler system within three years of the last test during a scheduled shutdown.


3.0             Planning

Notify the facility work coordinator using the approved electronic work control notification procedure. Allow one week for approval of the requested work and be prepared to reschedule the requested work to satisfy the areas production schedule.

3.1.            Staff Required: 3

3.2.            Time Required: 4 Hours

3.3.            Equipment Required

·         Manufacturer’s Manual

·         Full-Flow Trip Test Data Sheet


4.0             Test Preparation


4.1.            Ensure access to the necessary equipment is available and does not interfere with accelerator operation.

4.2.            Reference Fire Protection Supplemental Chapter 5: Fire Protection System Impairment Procedure for detailed instructions on work planning, advanced notification, and administrative controls.

·         Post the ‘Fire Alarm Systems Testing in Progress’ notification signs.

4.3.            Notify the SOTR to witness the test.

4.4.            Evacuate hazard area of all personnel.

4.5.            Disconnect the building audible alarms at the Fire Alarm Control Panel (FACP); station a knowledgeable technician at the FACP at all times that the audible alarms are disconnected. The knowledgeable technician is to remain attentive at the FACP at all times that the audible alarms are disconnected.

·         In the unlikely event that an unanticipated fire alarm signal is received on the FACP, the technician must reconnect the building audible devices and join the building evacuation.

4.6.            Disconnect preaction water sprinkler system and tag out.


5.0             Test the Priming Water Level


5.1.            Open the priming level test valve.

5.2.            If water flows, drain it.

5.3.            Observe the water discharge patterns from all open spray nozzles or sprinklers to ensure the following:

·         patterns are not impeded by plugged nozzles,

·         nozzles are correctly positioned, and

·         obstructions do not prevent discharge patterns from wetting surfaces to be protected.

5.4.            Close the valve when water stops flowing and air discharges.

5.5.            If air discharges when the valve is opened, the priming water level could be too low.  To add priming water, refer to the manufacturer’s instructions.

5.6.            If obstructions are found, perform the following steps until all obstructions are clear and the discharge pattern is unimpeded:

·         Clean the piping and sprinklers or nozzles.

·         Retest the system.


6.0             System Restoration


6.1.            Reconnect preaction water sprinkler system and remove lock out tag out.

6.2.            Reconnect the building audible alarms at the suppression control panel.

6.3.            Dismiss assisting technician at the FACP.

6.4.            Remove the ‘Fire Alarm Systems Testing in Progress’ notification signs previously posted.

6.4.1.      Notify the SOTR that the tests are complete and system is on-line and operational. Allow SOTR to verify that the system is in normal operating condition.

6.4.2.      Allow personnel to return to the area previously designated as hazardous.


7.0             Conclusion


Upon completion of the procedure, the preaction water sprinkler system is on-line and operational.


8.0             References

·         NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection, 2017 edition.

9.0             Revision Summary

Periodic Review – 01/03/19 – No changes per TPOC

Periodic Review – 06/02/16 – No changes per TPOC

Revision 0.1 – 04/23/15 – Minor reference clarification

Revision 0.0 – 06/16/11 – Initial Content 











Fire Protection Department

Tim Minga





This document is controlled as an on line file.  It may be printed but the print copy is not a controlled document.  It is the user’s responsibility to ensure that the document is the same revision as the current on line file.  This copy was printed on 1/10/2019.