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Installation Guidelines
Annual inspection of all water system safety and valves is
required. Regular inspection, testing, and cleaning assures
maximum life and proper product function.
Series 007DCDA can be installed in either a horizontal or vertical-up
orientation for service on commercial potable water or fire sprinkler
systems. Before installing the unit, the supply pipe lines must be
thoroughly flushed to remove foreign material that may cause
unnecessary check fouling. The backflow assembly must be installed
with the arrow on the valve body pointing in the direction of flow for
proper operation.
Watts recommends the installation of this device downstream
of a water meter and/or main line insolation shutoff valves using
techniques that comply with the latest edition of the Uniform
Plumbing Code. Consult Local Governing Code for proper
installation and agency code requirements.
Strainer Installations. The installation of a strainer upstream on
Series 007DCDA is recommended to prevent the check modules
from unnecessary fouling when used on commercial potable water
systems. Do not install a strainer when the backflow preventer is
called upon for emergency deluge or used on a fire sprinkler system
and/or individual sprinkler feed.
Fire Protection System Installations. The National Fire Protection
Agency (NFPA) Guidelines require a confirming flow test to be
conducted whenever a main line valve such as the shutoff valves or a
backflow assembly are in operation. A certified backflow tester must
conduct this test. The trim valves located on the detector meter
bypass line (if equipped) should be fully closed during the confirming
flow test of the main line backflow assembly. Once the testing is
completed, the trim valves must be returned to a fully open position.
Flange Connections. Inspect and retighten all flange gasket bolts
on the backflow assembly during installation. Flange gasket bolts
may have loosened due to storage, transport, and/or static system
hydro-testing.
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Indoor Installations
For indoor installation, the backflow preventer assembly must
be accessible to facilitate testing, main line valve servicing, and/
or removal of the detector meter bypass line. Do not install the
assembly in a concealed location.
Outdoor Installations
For outdoor installations, care must be taken to ensure the
assembly is not subjected to periods of freezing conditions. Freezing
conditions may damage the device and leave it non-operational. If
the installation is in an area subject to freezing conditions, the use of
an insulated and/or heated enclosure such as the WattsBox may be
required.
Below Ground Installations
Series 007DCDA is not recommend for below ground (burial)
installations. The most satisfactory installation is above ground;
the device should be installed in this manner whenever possible. If
below ground installation is required, the use of a valve box to shield
the assembly from contact with soil organics and provide adequate
drainage in the event of rainfall is recommended. Consult the Local
Governing Code for proper below ground installation and agency
code requirements.
Parallel Installations
Two or more Series 007DCDA assemblies may be piped in parallel
(where approved by Local Governing Code) to serve a larger supply
pipe main. This type of installation is employed whenever it is vital to
maintain a continuous supply of water, where interruptions for testing
and servicing would be unacceptable. Parallel installations also
provide an advantage to increase capacity where needed beyond
that provided by a single assembly and permit testing or servicing of
an individual assembly without shutting down the complete line. For
two valve installations, the total capacity should equal or exceed the
total requirement of the system.
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