Installation, Maintenance, and Repair Manual
Series 709, LF709, 709DCDA
Double Check Valve Assemblies
Double Check Detector Assemblies
2
1
⁄
2
" – 10"
RP/IS-709/709DCDA
Testing
For field testing procedure, refer to Watts installation sheets
IS-TK-DL, IS-TK-7, IS-TK-9A, IS-TK-99D, and IS-TK-99E at
www.watts.com.
For other repair kits and service parts, refer to the Backflow
Prevention Products Repair Kits & Service Parts price list
PL-RP-BPD at www.watts.com.
For technical assistance, contact your local Watts representative.
NOTICE
For Australia and New Zealand, line strainers should be installed
between the upstream shutoff valve and the inlet of the backflow
preventer.
This device must be tested periodically in compliance with local
codes, but at least once per year or more as service conditions
warrant. If installed on a fire sprinkler system, all mechanical
checks, such as alarm checks and backflow preventers, should
be flow tested and inspected internally in accordance with NFPA
13 and NFPA 25.
WARNING
!
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.
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.
WARNING
!
Series 709 (2
1
⁄
2
" to 10"), LF709 (2
1
⁄
2
" to 10"), and 709DCDA
(3" to 10") assemblies help prevent the reverse flow of polluted
water from entering the potable water system. Series LF709
Model IOT includes factory-installed pressure sensors.
LF709-NRS-IOT
NOTICE
Use of integrated pressure sensors on and monitoring connection
kit with IOT models does not remove the need to comply with all
required instructions, codes, and regulations related to installation,
operation, and maintenance of the backflow preventer.
Watts
®
is not responsible for data transmission failures due to
power issues.
NOTICE
For IOT models, an add-on monitoring connection kit is required
to collect psi measurements from the integrated pressure sensors.
Without the connection kit, the pressure sensors are passive
components and will not communicate with any other device. For
BMS only. (The connection kit and pressure sensors are also avail-
able for existing installations. See “Add-on Monitoring Connection
Kits,” for ordering details.)
709 OS&Y
