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WARNING
You are required to thoroughly read all installation instructions and product safety information
before beginning the installation of this product. FAILURE TO COMPLY WITH PROPER
INSTALLATION AND MAINTENANCE INSTRUCTIONS COULD RESULT IN PRODUCT
FAILURE WHICH CAN CAUSE PROPERTY DAMAGE, PERSONAL INJURY AND/OR
DEATH. FEBCO is not responsible for damages resulting from improper installation and/or
maintenance.
Local building or plumbing codes may require modifications to the information provided.
You are required to consult the local building and plumbing codes prior to installation. If this
information is not consistent with local building or plumbing codes, the local codes should be
followed.
Need for Periodic Inspection/Maintenance: This product must be tested periodically in
compliance with local codes, but at least once per year or more as service conditions war-
rant. Corrosive water conditions, and/or unauthorized adjustments or repair could render the
product ineffective for the service intended. Regular checking and cleaning of the product's
internal components helps assure maximum life and proper product function.
Installation Instructions
1. Consult local codes for specific installa-
tion requirements and restrictions appli-
cable to your area. It is recommended
that system supply pressure be at least
20psi (133kPa).
2. These instructions apply to Series 850,
LF850 (DC), 856, and 856ST (DCDA),
sizes 2
⁄
" to 10" only (65 – 250mm).
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2
The valves may be installed only in the
orientation/flow direction as shown. The
gate valves may be rotated as permit-
ted by the flange bolt pattern on vertical
installations only.
3. The valve assembly must be installed
where it is accessible for periodic
testing and maintenance. Clearances
shown in the installation views apply
to exterior, interior and pit/vault instal-
lations and are only recommendations.
These minimums do not apply to
removable protective enclosures. Refer
to local codes for actual requirements in
your area.
4. PRIOR TO INSTALLING THE VALVE
INTO THE LINE, FLUSH THE SUPPLY
LINE OF ALL FOREIGN MATERIAL.
Failure to flush the supply line may
cause the check valves to become
fouled and require disassembly and
cleaning.
5. Lift the assembly by connecting lift
hooks to the lift rings cast into
All manuals and user guides at all-guides.com
ENGLISH INSTRUCTIONS
the valve body. DO NOT LIFT THE
ASSEMBLY BY CONNECTING TO
THE GATE VALVE HANDWHEELS OR
STEMS.
6. After installation SLOWLY fill the
assembly with water and bleed air
from the body using the # 3 and # 4
test cocks. Test the valve assembly to
ensure correct operation.
NOTE:
All assemblies are tested at the
factory for proper operation and leakage.
If the valve does not pass the field test, it
is most likely due to a fouled check valve.
This is not covered by the factory warranty.
The valve cover(s) must be removed and
the check seats inspected and cleaned.
Any damage or improper operation caused
by pipeline debris or improper installation/
start-up is not included in the factory war-
ranty.
In case of a possible warranty claim,
contact your local supplier or FEBCO
Representative. DO NOT REMOVE THE
VALVE ASSEMBLY FROM THE PIPELINE.
7 . The assembly must be protected
from freezing and excessive pressure
increases. Thermal expansion or water
hammer can cause pressure increases.
These excessive pressure situations
must be eliminated to protect the valve
and system from possible damage.
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