Article

Freeze prevention checklist for sprinkler piping

Building envelope

Yes

No

N/A

Action needed/comments

Are penthouse openings including louvers properly sealed?        
Does attic have proper insulation?        
Windows are free of cracks and properly caulked?        
Is enough warm air circulated to stabilize temperatures near outer walls?        
If possible, are dampers on ducts leading to outside closed?        
Are temperatures monitored in out-of-the-way areas or other areas susceptible to dropping below 40ºF?        

Wet fire protection sprinkler systems

Yes

No

N/A

Action needed/comments

Is insulation tenting in attic properly placed over piping?        
Is a temperature of 40ºF or greater maintained in these susceptible areas?        
• Above false ceilings        
• Under floor spaces        
• Inside equipment penthouses        
• Stair towers        
• Areas near exterior walls        
Are central station water flow alarms working properly?        

Dry fire protection sprinkler systems

Yes

No

N/A

Action needed/comments

Are low point drains on dry system checked at least monthly?        
Are sprinkler valve enclosures properly heated to 40ºF or greater?        
Have missing or broken pipe hangers been replaced? (Helps ensure piping is properly pitched to low point drains)        
System checked for air leaks and repaired if needed? (Prevents system from tripping if power to compressor is lost)        

Is air intake for compressor located in a cool dry environment and equipped with air dryer if needed? (Helps prevent formation of condensation within piping)

       
Are central station water flow alarms working properly?        
Is the central station low air pressure alarm working properly?        

Fire pumps

Yes

No

N/A

Action needed/comments

Is the diesel engine driver room temperature maintained at 70°F or above?        
Is the electric engine driver pump room temperature maintained above 40°F?        
Is the suction source protected from freezing?        

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This material is provided for informational purposes only and does not provide any coverage or guarantee loss prevention. The examples in this material are provided as hypothetical and for illustration purposes only. The Hanover Insurance Company and its affiliates and subsidiaries (“The Hanover”) specifically disclaim any warranty or representation that acceptance of any recommendations contained herein will make any premises, or operation safe or in compliance with any law or regulation. 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 FEB 2019-301
171-1225 (10/15)