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.
OPE-KBSPEC-0024-C
1601 W. DEER VALLEY RD. PHOENIX, AZ 85027 |
T.
800-552-5669 |
F.
623-687-2290 | [email protected] |
KNOXBOX.COM
©Knox Company. All rights reserved.
KNOX FDC LOCK
™
OPERATING INSTRUCTIONS
Threads
per Inch
Diameter
2.5" Locking Cap
1.5" Locking Cap
Locking
Bolt Head
Pins
Swivel-Guard™
2.5" Locking Cap
with Swivel-Guard
™
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 flushing 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 flood 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 qualified inspector
at least once a year to ensure situations have not occurred that
would damage the device.
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 fit). If the Knox FDC Lock thread binds, remove and
check threads for damage or incorrect size.
INSTALLATION
Remove warning tag.
Remove all debris from
connection coupling threads
and from inside the pipe.
Flush system if necessary.
Using the key head on the
Knox FDC Spanner Wrench
or Knox Keywrench, turn
the locking bolt counter-
clockwise until it stops to
ensure it is fully unlocked.
Place the FDC Lock into
coupling and hand turn
clockwise until no threads are
showing. Do not use a spanner
wrench. Hand tighten ONLY.
Tighten locking bolt head
clockwise with Knox FDC
Spanner Wrench or Knox
Keywrench until firm.
Keywrench
FDC Spanner Wrench
Pin Holes
Pin Holes
Key
Key
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.
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.
1
2
3
4