RP/IS-919
Installation, Maintenance, and Repair Manual
Series 919, LF919
Reduced Pressure Zone Assembly
1
⁄
2
" – 2"
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.
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.
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.
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.
LF919-QT-FS
Series LF919 is equipped with a flood sensor that triggers
notification of potential flood events from excessive relief valve
discharges.
NOTICE
An add-on connection kit is required to activate the flood
sensor. Without the connection kit, the flood sensor is a passive
component that has no communication with any other device.
(A retrofit sensor connection kit is also available for existing
installations. See “Add-on and Retrofit Sensor Connection Kits,”
for ordering details.)
NOTICE
Use of the flood sensor does not replace the need to comply
with all required instructions, codes, and regulations related to
installation, operation, and maintenance of this product, including
the need to provide proper drainage in the event of a discharge.
Watts is not responsible for the failure of alerts due to connectivity
or power issues.
