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Pentagonal in shape
Coast Guard specification for fighting fires with drafted water
Color - Red
Our 4 inch Made in the USA double jacket fire hose is manufactured to this specification shall meet and exceed all performance requirements of NFPA 1961 and Underwriter's Laboratories standards
The opposite male side of this adapter will only connect to a 2 1/2 inch female camlock
Knox Box Storz 5" Locking Cap Inlet Size_4 1/2 Inch Pentagonal in shapeThe 5" Knox Storz Lock is operated with a Knox FDC Wrench controlled by the Fire Department. To ensure the Knox Storz Lock properly fits, the Knox Company strongly encourages the use of connections that meet the adapter specifications. The Knox Storz Lock protects large diameter Fire Department connections (FDC) from accidental damage, vandalism and physical attack. Since the locking cap holds water pressure, it can be installed on hydrants. The Knox