Knox Box Storz 4" Locking Cap Male Threads_NYC The hydrant flushing elbow attaches

The hydrant flushing elbow attaches to the 4 1/2 inches NH / NST outlet of the fire hydrant

For use up to 175 PSI (water only) at 70° F

This bag can hold 75 ft

Type "A" stainless steel 1/2 inch male camlock (Cam & Groove) coupler to 1/2 inch female NPT threads

Peel off the protective paper

Knox Box Storz 4" Locking Cap Male Threads_NYC The hydrant flushing elbow attachesThe4" 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