Watts 957-FS Series Manual

Installation, Maintenance, and Repair Manual
Series 957-FS, 957RPDA-FS, and
LF957RPDA-FS
Reduced Pressure Zone Assemblies
Reduced Pressure Detector Assemblies
2 ⁄ " – 10"
1
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 instal-
lation. 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 war-
rant. 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
!
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.
NOTICE
For Australia and New Zealand: Pipeline strainers should be
installed between the upstream shutoff valve and the inlet of the
backflow preventer.
Inquire with governing authorities for local installation requirements.
Series 957-FS, 957RPDA-FS, and LF957RPDA-FS are each
equipped with an integrated flood sensor that detects excessive
relief valve discharges and triggers notification of potential flood
events. An add-on sensor connection kit activates the alert
system for use with building management systems or cellular
communication networks. A retrofit sensor connection kit is available
for existing installations. See "Add-on and Retrofit Sensor
Connection Kits," at the end of this document for the qualifying
series and valve sizes.
Testing
For field testing procedure, refer to Watts
IS-TK-DP/DL, IS-TK-9A, IS-TK-99E and IS-TK-99D at
www.watts.com.
For technical assistance, contact your local Watts representative.
RP/IS-957/957RPDA-FS
957-FS-OSY
installation sheets
®