March 22, 2019

Performance Related Concern with Kidde-Fenwal Inc. Sentinel LS Vehicle Fire Protection System

  • Type of Notification: Performance Related Concern
  • FM Approval Status: FM Approved

FM Approvals has been made aware of a potential loss of pressure condition where the system safety relief activates at an operating temperature less than the maximum approved system operating temperature.


Company Identity: Kidde-Fenwal Inc
Address: 400 Main Street, Ashland, MA 01721
Contact Information: Tech Support (866) 287-2531 or


Product Identity: Sentinel LS Vehicle Fire Protection Systems
Description: LS Cylinder Valve Assemblies with AquaGreen®


Nameplate Data: All assemblies manufactured after November 2015


FM Approval Status: FM Approved


Hazard Involved: The safety relief for the described system is designed to rupture as a means of emergency pressure relief when the cylinder storage temperatures exceeds 200°F (93.3°C). It has been reported that these assemblies can rupture at operating temperature lower than 200°F (93.3°C). A rupture of the safety relief will result in a loss of system availability.


If you suspect you are in possession of the affected equipment listed above, bearing the FM Approvals certification marking, please bring that to the attention of:


Antonio Pires

Norwood, MA, United States

+1 (1) 781-255-4825