Install Instructions

5
Indoors - Figure 4
Series 007 may be installed in either a vertical or horizontal
position. Pipe lines should be thoroughly flushed to
remove foreign material before installing the unit. A strainer
should be installed as shown, ahead of backflow preventer to
prevent disc from unnecessary fouling. Install valve inline with
arrow on valve body pointing in the direction of flow.
For indoor installations, it is important that the valve be easily
accessible to facilitate testing and servicing. Do not install in a
concealed location.
CAUTION:
Do not install with strainer when backflow preventer is used on
seldom-used water lines which are called upon during emer-
gencies, such as fire sprinkler lines, etc.
It is important that Series 007 and LF007 be tested periodically
in compliance with local codes, but at least once a year or
more often depending upon system conditions.
NOTE:
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 have
been operated. Certified testers of backflow assemblies must
conduct this test. The trim valves of the detector meter bypass
line, on assemblies so equipped, should be shutoff during the
confirming flow test. When the test is completed, the trim
valves must be returned to a fully open position.
Outside Building Above Ground -
Figure 5
In an area where freezing conditions do not occur, Series 007
and LF007 can be installed outside of a building. The most sat-
isfactory installation is above ground and should be installed in
this manner whenever possible. In an area where freezing con-
ditions can occur, Series 007 and LF007 should be installed
above ground in an insulated enclosure.
Annual inspection of all water system safety and control valves
is required and necessary. Regular inspection, testing and
cleaning assures maximum life and proper product function.
Parallel - Figure 6
Consult Local codes for Approval
Two or more Series 007 and LF007 smaller size valves may be
piped in parallel (where approved) 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. It also has the
advantage of providing increase capacity where needed
beyond that provided by a single valve and permits testing or
servicing of an individual valve without shutting down the com-
plete line. For two valve installations the total capacity should
equal or exceed that required by the system.
The quantity of valves used in parallel should be determined by
the engineer's judgement based on the operating conditions of
a specific installation. (See F-FC regarding flow curves)
INSTALLATION NOTE: The flange gasket bolts for the gate
valves should be retightened during installation as the bolts
may have loosened due to storage and shipping.
Installation Instructions
Series 007 and LF007
2
1
⁄2" and 3"
2
1
⁄2", 3" 007 / LF007
2
1
⁄2", 3" 007 / LF007
Meter
Strainer
Series 77F-DI-FDA-125
Strainer Series 77F-DI-FDA-125
WattsBox Insulated Enclosures
Available in Aluminum or Fiberglass.
For more information, send for ES-WB.
Figure 4
Figure 5
Figure 6