Watts LF719 User Manual
Double check valve assembly
Installation, Maintenance, & Repair
Series 719 and Series LF719
Double Check Valve Assembly
Sizes:
1
⁄
2
" – 2" (15 – 50mm)
RP/IS-719
NOTICE
For Australia and New Zealand: Pipeline 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, construc-
tion, specifications, or materials without prior notice and without
incurring any obligation to make such changes and modifica-
tions on Watts products previously or subsequently sold.
1" 719QT and LF719QT
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 this informa-
tion is not consistent with local building or plumbing codes, the
local codes should be followed.
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.
Corrosive water conditions, and/or unauthorized adjustments
or repair could render the product ineffective for the service in-
tended. Regular checking and cleaning of the product’s internal
components helps assure maximum life and proper product
function.
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.
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
www.watts.com.
For other repair kits and service parts, refer to our Backflow Pre-
vention Products Repair Kits & Service Parts price list
PL-RP-BPD found on
www.watts.com.
For technical assistance, contact your local Watts representative.