Install Instructions

Indoors - Figure 1
Check local codes for installation requirements. Pipe lines
should be thoroughly fl ushed to remove foreign material before
installing the unit. A strainer should be installed as shown,
ahead of backfl ow preventer to prevent disc from unnecessary
fouling. Install valve in the line with arrow on valve body point-
ing in the direction of fl ow.
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 backfl ow preventer
is used on seldom-used water lines which are called upon dur-
ing emergencies, such as fi re sprinkler lines, etc.
It is important that Series 007 be tested periodically in compli-
ance with local codes, but at least once a year or more often
depending upon system conditions. Regular inspection, testing
and cleaning assures maximum life and proper product function.
NOTE: Fire Protection System Installations
The National Fire Protection Agency (NFPA) Guidelines require
a confi rming fl ow test to be conducted whenever a “main line”
valve such as the shutoff valves or a backfl ow assembly have
been operated. Certifi ed testers of backfl ow assemblies must
conduct this test. The trim valves of the confi rming fl ow test.
When the test is completed the trim valves must be returned to
a fully open position.
Outside - Figure 2
Parallel - Figure 3
Two or more Series 007 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 main-
tain a continuous supply of water/where interruptions for testing
and servicing would be unacceptable. It also has the advan-
tage of providing increased capacity where needed beyond that
provided by a single valve and permits testing or servicing of an
individual valve without shutting down the
complete line.
For two valve installations the total capacity of the devices
should equal or exceed that required by the system.
The quantity of valves used in parallel should be determined by
the engineers judgement based on the operating conditions of
a specifi c installation.
2
Min. 12"
Installation Instructions
Series 007 Double Check Valve Assemblies
First
Shutoff Valve
Strainer
First Shutoff
Valve
007QT-S Vertical flow-up or vertical flow-down installation (flow-up shown)
007QT-S
Strainer
Meter Box Installation
Fiberglass WattsBox
Now Available, WattsBox Insulated Enclosures.
For more information, send for ES-WB or ES-WB-T.
First
Shutoff Valve
First Shutoff Valve
Figure 1
Figure 2
Figure 3
007QT-S
RP-IS-007.indd 2 10/22/08 3:21:23 PM