The Knox StorzGuard® cap protects large diameter fire department connections from accidental damage, vandalism and physical attack. Since the cap holds water pressure, it can be installed on hydrants.
Cap is available in 4" and 5" configurations and is operated with a Knox Keywrench controlled by the fire department.
The Knox StorzGuard is made with forged materials to meet the original DIN Standards. Therefore, the cap may not fit properly onto a connection made of cast materials. Additionally, it is also compliant with NFPA 1963 Standard for Fire Hose Connections.
Adapters and Adapter Kits are available that include the adapter that attaches to the building's intake pipe.