Article

Sprinkler system — dry-pipe valves, inspection and testing checklist

Regular inspection, testing and maintenance of dry-pipe sprinkler valves and associated quick-opening devices are critical to ensure effective performance of a sprinkler system. All inspections and tests should be performed in accordance with NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems (2014 Edition), published by the National Fire Protection Association (NFPA).

Prior to performing any test, the facilities alarm system provider/monitoring station should be notified of the testing and following conclusion of the testing. When the results of any inspection or test are negative, a qualified sprinkler contractor should be contacted to investigate and correct the deficiencies.

The following checklist can be used to identify the required valve inspection and testing frequency for a dry-pipe valve sprinkler system:

Weekly inspections

Yes

No

N/A

Is the temperature of the enclosure, room, or area for the valve at least 40°F (4°C)? If the enclosure, room, or area is not equipped with a low-temperature alarm, this inspection should be performed daily.

     

Does the supply-side pressure gauge indicate normal water supply pressure?

     

Are the dry-side pressure gauge readings within manufacturer's specifications? If the system is equipped with a low-pressure alarm, this inspection can be performed monthly, rather than weekly.

     

Does the quick-opening device gauge, if so equipped, indicate the same pressure as the dry-side system pressure?

     

Monthly inspections

Yes

No

N/A

Does the valve assembly show any sign of leaking or physical damage?

     

Are all valves in the correct operating positions, as indicated by the system diagrams?

     

Annual inspections

Yes

No

N/A

Is the interior surface of valve body free from corrosion?

     

Are low temperature alarms, when present, inspected for damage?

     

Quarterly testing

Yes

No

N/A

Is the priming water filled to proper level, as per the manufacturer's specifications?

     

Does the quick-opening device activate properly?

     

Does the low air pressure alarm function properly?

     

Annual testing

Yes

No

N/A

Is a limited-flow, trip test of the dry-pipe system and quick-opening devices performed during warm weather?

     

Is a low temperature alarm function test performed at the beginning of the heating season?

     

Are air pressure maintenance devices tested?

     

Does the air supply refill the systems, following a trip test, in 30 minutes or less? This time can be extended to 60 minutes in refrigerated spaces having a temperature of less than 5°F (-15°C).

     

Multi-year inspections and tests

Yes

No

N/A

Are all system strainers, filters, and restricting devices tested every five years for corrosion and obstructions?

     

Is a full-flow, system trip test, including the quick opening, performed every three years?

     

Are system gauges tested or replaced every five years? Gauges should be accurate to within three percent of full scale.

     

Is the system tested every three years for air leaks?

     

 


Copyright ©2016 ISO Services, Inc.

The recommendation(s), advice and contents of this material are provided for informational purposes only and do not purport to address every possible legal obligation, hazard, code violation, loss potential or exception to good practice. The Hanover Insurance Company and its affiliates and subsidiaries ("The Hanover") specifically disclaim any warranty or representation that acceptance of any recommendations or advice contained herein will make any premises, property or operation safe or in compliance with any law or regulation. Under no circumstances should this material or your acceptance of any recommendations or advice contained herein be construed as establishing the existence or availability of any insurance coverage with The Hanover. By providing this information to you, The Hanover does not assume (and specifically disclaims) any duty, undertaking or responsibility to you. The decision to accept or implement any recommendation(s) or advice contained in this material must be made by you.

LC DEC 2018 2015-349
171-1749 (12/18)