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O-Ring Sprinklers

Safety concerns associated with “O”-ring sealed sprinklers

In previous public notices and published articles UL has recommended the immediate replacement, or representative sample testing, of all systems incorporating fire sprinklers equipped with an O-ring water seal.  To assist property owners, authorities having jurisdiction and others in identifying “O”-ring sealed sprinklers, UL developed this list of O-Ring Sealed Sprinklers and has provided this article entitled Maintaining a High Level of Fire Sprinkler Performance.

For more information or if you have any questions, please contact:

Mr. Kerry Bell
UL 
333 Pfingsten Road
Northbrook, IL  60062
Tel:      847-664-2629
E-mail:  [email protected]

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