2
Installation Guidelines
NOTICE
The flange gasket bolts for the gate valves should be
retightened during installation as the bolts may have
loosened due to storage and shipping.
1. Consult local codes for specific installation requirements and
restrictions applicable to your area. At least 20 psi (138 kPa) is
recommended for system supply pressure.
2. Install the valve assembly only in the orientation or flow direction
shown. The gate valves may be rotated as permitted by the
flange bolt pattern.
NOTICE
Normal discharge and nuisance spitting are accommodated by
use of a FEBCO
®
air gap fitting and a fabricated indirect waste
line. The gap drain is not designed to catch the maximum dis-
charge possible from the relief valve. The installation of a FEBCO
air gap with the drain line terminating above a floor drain handles
any normal discharge or nuisance spitting through the relief valve.
However, floor drain size may need to be designed to prevent
water damage caused by a complete failure condition. Do not
reduce the size of the drain line from the air gap fitting.
When installing an air gap, attach the air gap brackets directly
onto the flood sensor.
3. Install the valve assembly where it is accessible for periodic
testing and maintenance. Clearances shown in the installation
views apply to exterior, interior, and pit or vault installations
and are only recommendations. (See Figures 1 and 2.) These
minimums do not apply to removable protective enclosures.
Refer to local codes for actual requirements in the area.
4. Before 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 the valve body. Do not lift the assembly by connecting to
the gate valve handwheels or stems. Use of the optional valve
setters (horizontal units only) provides for a rigid connection to
the supply line (with the correct centerline) without the need for
concrete thrust blocks.
6. For vertical installation, follow this procedure:
• Loosen the bolts on the groove coupling just enough to
allow rotation of the outlet check.
• Remove the hose from the inlet of the bypass meter, being
sure to remove and save the gasket.
• Rotate the outlet check 180° to the vertical position and
install pipe support (to be furnished by the customer and
shall fit the same size pipe as the valve being installed,
except 21/2" valves require a 3" pipe support) on the pipe
support lug that is now positioned under the check.
(See Figure 2.)
• Retighten and inspect groove coupling.
• Reattach the hose to the inlet of the bypass meter, being
sure to include the gasket removed previously, and ensuring
meter is oriented with the face plate up. If necessary, adjust
the bypass piping to connect the bypass hose by loosening
the nuts on the bulkhead fittings that attach the bypass to
the valve body and rotating the piping. Retighten the bulk-
head nut once the piping is in place.
NOTICE
It may be desirable to move the bypass mounting bracket based
on the location of the valve. The bypass mounting bracket can
be moved to the opposite side. Follow the preceding instructions
for rotating the bypass piping to accommodate the new position.
NOTICE
The valve body and pipe support are intended to support the
weight of the second check valve and outlet gate valve only. The
piping above the outlet gate valve must be supported indepen-
dently. Retighten the bolts of the groove coupling. Rotate the
outlet gate valve as desired or required.
7. (For vertical installation) Remove the formed tube from the
bypass piping, then repeat step 6. Upon completion, rotate
the compression fitting elbow 180º and reinstall the tube,
rotating the pipe tee now at the bottom of the outlet check to
align with tube.
8. After installation, slowly fill the assembly with water and bleed
air from the body using test cocks No. 3 and No. 4. Test the
valve assembly to ensure correct operation.
NOTICE
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 or start-up is
not included in the factory warranty. In case of a possible war-
ranty claim, contact the local supplier or FEBCO representative.
Do not remove the valve assembly from the pipeline.
9. Protect the assembly from freezing and excessive pressure
increases. Pressure increases can be caused by thermal
expansion or water hammer. These excessive pressure situa-
tions must be eliminated to protect the valve and system from
possible damage.
