Can you believe we are reaching Q4 already? To prepare for Knox's annual plant shut down for maintance (Mid December),


Any orders placed after this date will likely be unable to be fulfilled until 2023.

If you have further questions please email or give us a call at 720-710-5669.

Thanks, The Sentry Tech Team

Knox Storz Locks & Adapters

Calculated at Checkout
  • 5001- Knox Storz Lock, 4-Inch
  • 5002- Knox Storz Lock, 5-inch
  • Straight Adapter
  • 30 Degree Elbow Adapter
MSRP: $775.00
— You save $271.00
Frequently bought together:


  • Benefits
  • Options
  • Specs
  • Installation
  • Adapter Installation
  • Need Help?
  • FAQ


The Knox Storz Lock protects large diameter Fire Department Connections (FDC) from accidental damage, vandalism, and physical attack. Since the locking caps hold water pressure, it can be installed on hydrants. Available in 4" and 5"configurations, the Knox Storz Lock is operated with a Knox Keywrench controlled by the Fire Department. To ensure the Knox Storz Lock properly fits, the Knox Company strong encourages the use of connections that meet the adapter specifications.


  • Made with forged materials to meet the original DIN Standards
  • Compliant with NFPA 1963 Standard for fire hose
  • Visible locked/unlocked indicator
  • Water-Tight
  • Machined 6061-T6 aluminum
  • Authorized by 2018 IFC1 and IBC2 (Chapter 912.4.1) and 2018 NFPA 13 (Chapter 13.1.13)
  • Enacted in 2003, 2006, 2009 and 2012 (Chapter 912.3.1) and 2015 (Chapter 912.4.1) of IFC editions
  • Enacted in 2009, 2012, and 2015 (Chapter 13.1.12)


  • Supplies long-term FDC protection against vandalism
  • Reduces unauthorized cap removal and cap theft
  • Assures clean fire department connection lines
  • Reduces sprinkler contractor service calls to flush system
  • Discourages water theft

Right click HERE to download spec sheet on Stroz Locks

Right click HERE to download operating instructions

Right click HERE to download adapter installation instructions

Right click HERE for more information on FDC Requirements for Colorado



1. Select size:

  • 4-Inch NH size
  • 5-Inch NH size

2. Buy Individual or bundled

  • Just the Cap
  • Adapter and Cap
  • Just the Adapter

3. Choose Adapter Standard

The Knox Storz Lock Adapters have a hard anodized aluminum metal face and are available in both 4" and 5" configurations. These forged adapters are available in straight or 30 degree elbow configurations that connect to 4" and 6" National Pipe Thread (NPT). Each adapter includes three heavy duty stainless steel set screws. The adapters are compliant with the DIN Standard and NFPA 1963 Standard for Fire Hose Connections. Forged aluminum connections provide for greater firefighter safety. Storz Lock Adapters and Storz Lock caps are available in turn key kits or individually.




To insure procurement and delivery of the Knox Storz Lock, it is
suggested that the following specification paragraph be used:

Sizes: 4-inch and 5-inch

Construction and Finish: Knox Storz Lock made of anodized aluminum.

Lock: Locks with a proprietary Knox Keywrench

Finish: Knox-Coat® proprietary finishing process

Color: Dark, hard anodized aluminum

P/N: 4-inch - 5001; 5-inch - 5002 (mfr’s cat. ID)


Right click HERE to download complete Spec Sheet


Right click HERE to download operating instructions

Right click HERE to download adapter installation instructions


Need help finding the right product? Happy to help!

Contact US!

Ordering Support:

Call Us: 720-710-KNOX (5669)

Email Us:

Or simply right click HERE to send us a message!


6311 Washington St.
Unit H
Denver, CO 80216

MON-FRI 9:00AM-5:00 PM MST

We are happy to help with any questions that you may have.

What Product Model Do I Need to Order?

Contact your local Fire or Public Safety Department for Knox product recommendations.

What are Spec Sheets?

Spec sheets are available on this page under the "Brochures & Specs" section or can be found here

Where do I Install the Knox FDC Lock and Storz Caps?

Knox locking FDC caps protect fire department connections and are generally found on the exterior of buildings. Knox Storz Lock caps protect fire hydrant and fire department connections which can be found in stairwells, parking garages and the exterior of buildings.

Who Installs the Products?

After receiving your Knox locking FDC caps, call your responding Fire Department to schedule an inspection and help install and lock the caps.

Have More Questions?

Click here to email us your questions. Or give us a call 720-710-KNOX (5669)

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