U-20808/U-20809 Non-Adjustable Vertical Indicator Posts
General Information
2
3
Approvals and Standards
Model U-20808/U-20809 Indicator
Posts are listed by Underwriters
Laboratories Inc. (UL). Model
U-20808 Indicator Posts are
approved by Factory Mutual
Research Corporation.
WARNING: The Model
U-20808/U-20809 Indicator Posts
described herein must be installed
and maintained in compliance
with this document, as well as
with the applicable standards
of the National Fire Protection
Association, in addition to the
standards of any other authorities
having jurisdiction. Failure to do
so may impair the integrity of
these devices.
The owner is responsible for
maintaining their fire protection
system and devices in proper
operating condition. The installing
contractor or manufacturer should
be contacted relative to any
questions.
Removing or disabling the tamper
resistant feature of the special key
wrench screw (used to secure the
cover of the Supervisory Control
Valve Switch) will void its listings
and approval.
Vertical Indicator Posts are designed
to operate non-rising stem (inside
screw) gate valves, which are
used to control an underground
water supply to automatic sprinkler,
water spray deluge, foam-water
deluge, or standpipe fire protection
systems. They permit operation of
underground valves while providing
an above ground visual indication
as to whether the valves are open
or shut, in addition to a means for
locking the valves in a particular
position. Indicator posts provide for
valve operation from outside of the
protected property and, therefore, the
opportunity for more prompt valve
operation in an emergency situation.
U-20808 Indicator Posts will
accommodate 4” – 14” post indicator
valves (PIV) requiring 14 to 43
turns to open and that are listed or
approved for fire protection system
service. The U-20809 Indicator Post
will accommodate 16” – 24” post
indicator valves requiring 49 to 75
turns to open.
Indicator Posts are provided
“Standard Order” for use with left
hand opening valves; however,
they may be “Special Ordered” for
use with right hand opening valves
or converted in the field for use
with a right hand opening valve by
changing the left hand opening Post
Head to a right hand opening Post
Head.
Indicator Posts accept direct
attachment of a
1
/
2
” NPT mounting
electric supervisory switching device
which can be used by proprietary
and central stations to monitor the
open position of the Indicator Post.
Detailed information on attaching
a UL/FM approved Supervisory
Control Valve Switch (supplied by
customer) is given in the Technical
Data section.
overview
typical installation
TYPICAL INSTALLATION OF:
U-20808: 4” - 14” Post Indicator Valves
U-20809: 16” - 24” Post Indicator Valves
Padlock
!
UL/FM
Approved
Supervisory
Control
Valve
Switch
(supplied by
customer)