Watts 709 - Manual

709 OSY
ES-709L
Ball Valve Test Cock
Check Assembly
Module
Bolted Cover
Replaceable
Resilient
Disc
Replaceable Seat Lower Stem
Guide
Job Name ______________________________________________ Contractor ______________________________________________
Job Location ____________________________________________ Approval ______________________________________________
Engineer________________________________________________ Contractor’s P.O. No. ______________________________________
Approval________________________________________________ Representative __________________________________________
For Non-Health Hazard Applications
Now Available
WattsBox Insulated Enclosures.
For more information, send for literature ES-WB.
IMPORTANT: INQUIRE WITH GOVERNING AUTHORITIES
FOR LOCAL INSTALLATION REQUIREMENTS
Series 709
Double Check Valve Assemblies
Sizes: 2 1 ⁄
2
" – 10" (65 – 250mm)
Series 709 Double Check Valve Assemblies are designed to
prevent the reverse flow of polluted water from entering into
the potable water system. This series can be applied, where
approved by the local authority having jurisdiction, on non-
health hazard installations. Series 709 features a modular
check design concept to facilitate easy maintenance. Check
with local jurisdictional authority as to installation require-
ments.
Features
• Replaceable bronze seats
• Maximum flow at low pressure drop
• Design simplicity for easy maintenance
• No special tools required for servicing
• Captured spring assemblies for safety
• Approved for vertical flow up installation
Models
Suffix:
NRS – non-rising stem resilient seated gate valves
OSY – UL/FM outside stem and yoke resilient seated gate
valves
S-FDA – FDA epoxy coated strainer
BB – bronze body - 2
1 ⁄
2
" – 3" (64 – 76mm)
QT – quarter-turn ball valves
QT-FDA – FDA epoxy coated ball valve shutoffs
LF – without shutoff valves
Specifications
A Double Check Valve Assembly shall be installed at referenced
cross-connections to prevent the backflow of polluted water
into the potable water supply. The cross-connections shall be
determined by local inspection authority for use where a high
hazard situation does not exist. Valve shall feature modular
check assemblies with center stem guiding. Each check
module shall have a captured spring and be accessible
through a bolted cover plate. Seats shall be replaceable with-
out special tools. It shall be a complete assembly including
tight-closing resilient seated shutoff valves, test cocks, and a
strainer is recommended. The assembly shall meet the
requirements of ASSE No. 1015; AWWA C510-92; CSA
B64.5 and UL Classified File No. EX3185. Approved by the
Foundation for Cross-Connection Control and Hydraulic
Research at the University of Southern California. Assembly
shall be a Watts Regulator Company Series 709.
Check Assembly Module
Series 709 features a modular design concept which facili-
tates complete maintenance and assembly by retaining the
spring load. Also, the first and second check module are
identical and can be interchanged.
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 with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.