Watts 007M3QT Installation, Maintenance & Repair
Installation, Maintenance, & Repair
Series 007 and LF007
Double Check Valve Assemblies
Sizes: 1⁄2" – 3" (15 - 80mm)
!
WARNING
3
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information
can result in death, serious personal injury, property
damage, or damage to the equipment.
Keep this Manual for future reference.
Installation Instructions
⁄4" 007M3QT
RP/IS-007
!
WARNING
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 the information provided here is not consistent with local building or plumbing codes, the local codes
should be followed. This product must be installed by a
licensed contractor in accordance with local codes and
ordinances.
!
WARNING
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 warrant.
All products must be retested once maintenance has been
performed. 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 and external components helps assure maximum life and
proper product function.
NOTICE
For Australia and New Zealand, line strainers should be installed
between the upstream shutoff valve and the inlet of the backflow
preventer.
Watts product specifications in U.S. customary units and metric
are approximate and are provided for reference only. For precise
measurements, please contact Watts Technical Service. Watts
reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without
incurring any obligation to make such changes and modifications
on Watts products previously or subsequently sold.
Series 007 and LF007
1
⁄2" - 2" (15 - 50mm)
Indoors - Figure 1
Check local codes for installation requirements. 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 emergencies, 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. Regular inspection, testing and
cleaning assures maximum life and proper product function.
NOTICE
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.
Testing
For field testing procedure, refer to Watts installation sheets
IS-TK-DP/DL, IS-TK-9A, IS-TK-99E and IS-TK-99D found on
Watts.com.
For other repair kits and service parts, refer to our Backflow
Prevention Products Repair Kits & Service Parts price list PL-RPBPD found on Watts.com.
For technical assistance, contact your local Watts representative.
Meter Box Installation
Installation Instructions
Series 007 and LF007
1
⁄2" - 2" (15 - 50mm)
Figure 1
Strainer
Figure 2
WattsBox Insulated
Enclosure
Available in Aluminum
or Fiberglass.
For more information,
send for ES-WB.
Figure 3
Shutoff Valve
007QT-S / LF007QT-S
First Shutoff
007QT-S/LF007QT-S
Vertical flow-up installation
First
First
Shutoff Valve
Valve
Strainer
Parallel - Figure 3
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 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
specific installation.
Service and Maintenance
Servicing the First and Second Check Valves
NOTICE
Before servicing, ensure supply water is turned off or shutoff valves
are in the closed position. Open test cocks #2, #3, and #4 to
relieve pressure inside the valve prior to removing valve
cover.
1. Remove the cover, then remove the retainer from the body
valve. The check valve modules can now be removed from the
valve by hand or with a screwdriver.
NOTICE
For Series 007 and LF007 sizes 1⁄2" - 2" (15-50mm), the seats and
springs of the first and second check modules are not interchangeable. The heavier spring and smaller diameter seat belong with the
first check module. Series 007M1 sizes
Series 007M2
3
⁄4" (20mm) have interchangeable seats and springs.
2. The check seats are attached to the cage with a bayonet type locking arrangement. Holding the cage in one hand, push the seat inward and rotate clockwise against the cage. For
007M2/LF007M2 and LF007 pull apart seat and cage. The seat,
cage, spring and disc assembly are now individual components.
3. The disc assembly may now be cleaned and reassembled or,
depending on its condition, it may be discarded and replace with
a new assembly from the repair kit. O-rings should be cleaned or
replaced as necessary.
4. Reassemble the check valve module in the reverse order. Check
modules are installed in the valve body with the seats facing
the valve inlet. The modules must be securely in place before
the retainer can be replaced. On the
this retainer may have to be tilted slightly into place. Replace
cover, and close all test cocks before returning the valve
to service.
Check
O-rings
Cage
3
⁄4" - 1" (20-25mm) and
3
⁄4" (20mm) Series
3
⁄4" - 1" (20-25mm) size,
Cover
Cover
O-ring
Retainer
Second Check
First Shutoff Valve
007QT-S / LF007QT-S
For repair kits and parts, refer to our Backflow
Prevention Products Repair Kits & Service Parts
price list PL-RP-BPD found on www.watts.com.
2
Seat
Disc
Spring
Seat
Seat
O-ring
Disc
Assembly
Spring
Check
Cage
First Check
Body
Cover
Cover
O-ring
First Check
Second Check
Retainer
Body
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