KNOX FDC LOCK
OPERATING INSTRUCTIONS
The Knox FDC Lock has been designed for ease-of-use when installing or removing the lock from a fire
department connection (FDC). Fire personnel properly equipped with a Knox FDC Spanner Wrench or
Knox Keywrench can quickly remove the lock. In the event of debris or ice buildup on the locking bolt
head, a small flathead screwdriver or similar tool will quickly remove any foreign matter.
™
Swivel-Guard™
Locking
Bolt Head
Pins
KNOX FDC LOCK
IDENTIFICATION
Each Knox FDC Lock is etched
with a unique serial number on the
cap face. The cap thread size and
diameter is etched on the back of
the cap. Verify that the connection
coupling thread is the same size
before attempting cap installation.
2.5" Locking Cap
with Swivel-Guard
™
2.5" Locking Cap1.5" Locking Cap
Diameter
Threads
per Inch
INSTALLATION
Remove warning tag.
1 2 3 4
Remove all debris from
connection coupling threads
and from inside the pipe.
Flush system if necessary.
REMOVAL
1. Inspect locking bolt head and remove any debris, if necessary.
2. Use the key head of the Knox FDC Spanner Wrench or Knox
Keywrench to turn the locking bolt head counter-clockwise
until fully unlocked (Keywrench will stop).
3. Use the pin holes on the Knox FDC Spanner Wrench or Knox
Keywrench to unscrew the Knox FDC Lock from the connection.
4. If the locking bolt is completely loosened and the lock will still
not release, use the spanner end of the Keywrench to engage
the pins on the face of the Knox FDC Lock and unscrew
counter-clockwise as shown below.
Using the key head on the
Knox FDC Spanner Wrench
or Knox Keywrench, turn
the locking bolt counterclockwise until it stops to
ensure it is fully unlocked.
Pin Holes
Key
FDC Spanner Wrench
Key
Pin Holes
Keywrench
Place the FDC Lock into
coupling and hand turn
clockwise until no threads are
showing. Do not use a spanner
wrench. Hand tighten ONLY.
INSTALLATION NOTES:
• For Swivel-Guard model, line up locks on swivel with cut
outs in swivel guard ring, then spin swivel to thread the
Knox FDC Lock into the connection.
• Knox FDC Lock should easily thread into connection coupling
(loose t). If the Knox FDC Lock thread binds, remove and
check threads for damage or incorrect size.
CAUTION:
Knox FDC Locks are not designed to function as pressure-seal
plugs for wet systems. If the check valve upstream is defective
and leaks water, the water will go through the FDC Lock to show
leakage. The defective check valve must be repaired.
When back ushing your FDC system for clean out, you
must remember to remove all of the Knox FDC Locks so that
contaminated water and debris will not ood the locks and
cause contamination problems. This is especially important if
the sprinkler system has developed microbial infestation.
Knox FDC Locks should be inspected by a qualied inspector
at least once a year to ensure situations have not occurred that
would damage the device.
Tighten locking bolt head
clockwise with Knox FDC
Spanner Wrench or Knox
Keywrench until rm.
1601 W. DEER VALLEY RD. PHOENIX , AZ 85027 | T. 800 -552-5669 | F. 623-687-2290 | INFO@K NOXBOX .COM | KNOXBOX.COM
©Knox C ompany. Al l rights r eser ved.
OPE-KBSPEC-0024-C
KNOX FDC LOCK
OPERATING INSTRUCTIONS
FDC BRASS ADAPTER RECOMMENDED INSTALLATION PROCEDURE
Theft of items containing materials such as copper and brass are a growing problem for property owners and
firefighters. Knox recommends taking the following steps to ensure the entire FDC assembly is permanently
secured to the pipe thread on the building to reduce risk of theft and vandalism of the housing and pipe.
This procedure involves installing one or more 5/16"- 18 Allen set screws and a special permanent adhesive to
secure the FDC Brass adapter to the pipe thread on the building.
™
Use Letter F drill bit to drill a
1
hole entirely through the brass
adapter lip, approximately
1/2" from lip edge. One hole
provides extra security. Three
holes spaced 120° apart will
provide much better security.
Tighten and position FDC
5
brass adapter on pipe.
Adapter Lip
Tap threads in the holes using
2 3 4
a 5/16"-18 thread tap.
Use 1/4" drill bit to spot drill
6 7 8
through the set screw holes
in adapter and into pipe
approximately 1/16" deep.
Do not drill too deep
and pierce pipe.
Clean pipe threads thoroughly
with solvent and wire brush.
Dry completely. NO grease
or oil can be present on the
pipe threads in order for
adhesive to work properly.
Clean drill holes of debris
then place a small amount of
remaining Permabond HM162
in hole and on set screws,
then install set screws,
securing rmly with a 5/32"
Allen wrench.
Apply Permabond
threads on both the adapter
and pipe. Coating should
be thin and completely
coat the threads.
After set screws have been
secured, insert a ball bearing
slightly larger than the Allen
hole into the screw head
and use punch to hammer
into place. Alternatively,
ll the screw head with a
permanent epoxy material.
This will virtually eliminate
removal attempts.
®
HM162 to
1601 W. DEER VALLEY RD. PHOENIX , AZ 85027 | T. 800 -552-5669 | F. 623-687-2290 | INFO@K NOXBOX .COM | KNOXBOX.COM
©Knox C ompany. Al l rights r eser ved.
Spot Drill Detent
Siamese Brass
Pipe Wall
NOTE:
To minimize potential of pipe
being stolen, attach a clamp
on the backside of install wall.
OPE-KBSPEC-0024-C
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