Knox Box FDC Lock 2 1/2" NH/NST Male Locking Cap

Item Number: 3110
  • Knox Box FDC Lock 2 1/2" NH/NST Male Locking Cap
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$591.00
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Shipping Cost: Free on orders over $100

Brand -

  • Weight: 3.05 lb
  • Material: Stainless steel to withstand all weather conditions
  • Lock: Locks with a proprietary Knox FDC wrench
  • Size: 2 1/2 inch
  • Locking mechanism secures and protects FDCs

Description

Knox FDC Lock — Locking Cap for Fire Department Connections
Protect your building's fire sprinkler system at its most vulnerable point. The Knox FDC Lock secures fire department connections (FDCs) against debris, vandalism, and freeze damage — keeping check valves clear and ensuring full water flow when seconds count.
Machined from stainless steel to withstand years of weather exposure, Knox FDC Locks are available in a range of National Hose (NH) thread configurations and are removable only with a Knox FDC wrench controlled by your local fire department.
Key Benefits
  • Guarantees fast, reliable FDC access for fire crews
  • Prevents debris buildup and costly pipe back-flushing
  • Shields check valves from freeze damage in cold climates
  • Stainless steel construction for long-term durability
  • Tamper-resistant — only authorized fire personnel can remove
Common Applications
Commercial fire sprinkler systems, standpipes in parking garages and stairwells, and exterior FDC connections.
Before Ordering: Thread patterns and sizes vary by jurisdiction. Select the variant that matches your local fire department's specifications — additional thread patterns are available on request.

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Additional Details

The 3110 model with 2½" NH threads (7.5 TPI x 3.068 OD) is the most widely used configuration — however, thread patterns and sizes vary by jurisdiction, so always verify the correct specifications with your local fire department before ordering.

Knox FDC Locks protect fire department connections (FDCs), keeping pipes clean of debris to ensure the delivery of high-pressure water flow to fire sprinkler systems. The Knox FDC Lock is available in 2 1/2" configuration and is operated with a Knox FDC wrench controlled by the Fire Department.

Protect Your Building's Lifeline to Fire Prevention
  • Ensures ready and reliable connections to fire sprinkler systems
  • Protects check valves from freezing in cold climate areas
  • Eliminates costly services to back flush the pipes due to debris
  • Stainless steel body built to endure extreme weather, year after year
  • Available in standard National Hose Thread (NH) and additional thread patterns upon request
  • Secure locking FDC cap accessible only by Fire Department personnel
Applications
  • Commercial fire sprinkler systems
  • Standpipes located in parking garages and stairwells Koorsen
  • Exterior building FDC connections

Specifications