A tool used to stop the flow of water from a sprinkler head without shutting the system down. See: Sprinkler Block, Sprinkler Stopper; See also: Sprinkler Wedge
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}