Knox Box Locking Fire Department Connection (FDC) Caps

Knox Box FDC Locking Caps secure Fire Department Connections (FDCs) — protecting fire sprinkler and standpipe systems from debris, vandalism, and brass theft. Knox Box FDC, Storz and standpipe locks deliver a fire department-controlled solution that keeps connections clean and emergency-ready. All Knox Box locking caps are operated with a Knox Box key wrench.

Frequently Asked Questions

What are FDC locking caps used for?

FDC locking caps secure Fire Department Connections on buildings with water-based fire protection systems. They prevent debris, vandalism, and theft from compromising the FDC, ensuring firefighters can quickly supplement water pressure during an emergency.

How much can an unprotected FDC cost a building owner?

Debris-clogged FDC lines require professional backflushing that can cost over $2,000 per incident. Knox FDC Locking Caps eliminate that risk while also protecting against brass and copper theft — saving building owners significant time and money.

What sizes are Knox FDC Locks available in?

Knox Fire Department Connections (FDC) and Standpipe Locks are available in 1.5", 2.5" and 3" configurations. Storz Lock are available in 4" and 5".

How are Knox FDC locking caps removed?

All Knox FDC Locking Caps are removed using a Knox Keywrench, which is provided to fire departments at no cost when they join the Knox FDC Protection Program.

What is the Knox Swivel-Guard?

The Knox FDC Lock with Swivel-Guard covers the entire siamese brass FDC swivel connection, protecting it from theft. The set screw is inaccessible to unauthorized users, significantly reducing the risk of the connection being stolen.