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
333 Pfingsten Road
Northbrook, IL. 60047