Watts 709DCDA User Manual
For Non-Health Hazard Applications
ES-709DCDA
Job Name
Job Location
Engineer
Approval
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Series 709DCDA
Double Check Detector Assemblies
Sizes: 3" – 10" (80 – 250mm)
Series 709DCDA Double Check Detector Assemblies are
designed exclusively for use in accordance with water authority containment requirements. It is mandatory to prevent the
reverse flow of fire protection system substances, i.e. glycerin
wetting agents, stagnant water and water of non-potable quality from being pumped or siphoned into the potable water line.
Benefits: Detects leaks . . . with emphasis on the cost of unaccountable water; incorporates a meter which allows the water
utility to:
• detect leaks underground that historically create great annual
cost due to waste.
• provide a detection point for unauthorized use. It can help
locate illegal taps.
Modular check design concept facilitates maintenance and
assembly access. All sizes are standardly equipped with
resilient seated OSY shutoff valves,
5
⁄8" x 3⁄4" (16 x 19mm) meter and ball type test cocks.
Contractor
Approval
Contractor’s P.O. No.
Representative
709DCDAOSY
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Check Assembly
Module
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Test Cock
Cover
Features
• Body construction fused epoxy coated cast iron
• Replaceable bronze seats
• Maximum flow at low pressure drop
• Compact for economy combined with performance
Design simplicity for easy maintenance
•
• Furnished with
• No special tools required for servicing
5
⁄8" x 3⁄4" (16 x 19mm) bronze meter
Specifications
A Double Check Detector Assembly shall be installed on fire
protection systems when connected to a potable water sup
ply. Degr
authority having jurisdiction. The unit shall be a complete
assembly including UL listed resilient seated OSY shutoff
valves and test cocks. The unit shall be UL/FM approved with
UL/FM approved OSY shutoff valves. The auxiliary line shall
consist of an approved backflow preventer and water meter.
The assembly shall meet the basic requirements of ASSE
1048; AWWA Std. C510 for Double Check Valves. Approved
by the Foundation for Cr
Research at the University of Southern California. Assembly
shall be a Watts Regulator Company Series 709DCDA.
ee of hazard present is determined by the local
oss-Connection Control and Hydraulic
Seat
Disc
Check Assembly Module
Features a modular design concept which facilitates complete
maintenance and assembly by retaining the spring load.
First and second check valve spring modules are not interchangeable.
-
WattsBox Insulated Enclosures.
For more information, send for literature ES-WB.
IMPORTANT: INQUIRE WITH GOVERNING AUTHORITIES
Now Available
FOR LOCAL INSTALLATION REQUIREMENTS
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact W
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
atts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
Materials
Body: Epoxy coated cast iron
Seat: Bronze
Disc Holder: Bronze
Trim: Stainless steel
Check Valve Discs: Rubber
Test Cocks: Bronze
Pressure – Temperature
Temperature Range: 33˚F – 110˚F (0.5˚ – 43˚C) continuous,
140˚F (60˚C) intermittent
Maximum Working Pressure: 175psi (12.1bar)
Standards
AWWA Standard C510
Models
Suffix:
OSY - UL/FM outside stem and yoke resilient seated gate
valves
CFM - cubic feet per minute meter
GPM - gallons per minute meter
LF - 4" – 10" (100 – 250mm) without shutoff valves
Dimensions – Weights
U*
Approvals
B.64
Approved by the foundation for Cross-Connection Controland
Hydraulic Research at the University of Southern California.
Sizes 4" – 10" (100 – 250mm) approved for horizontal and
vertical “flow up”. Size 3" (76mm) approved for horizontal only.
Factory Mutual approved 4" – 10" (100-250mm) vertical
“flow up”.
C
(open)
D
1048
E
L
A
SIZE (DN) DIMENSIONS WEIGHT
D E L R T U* W/OSY† gates
In. mm
AC
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
R
T
3 80 40 1016 187⁄8 479 31⁄2 89 12 305 24 610 14 356 3 76 14 356 190 86
4 100 52 1321 223⁄4 578 33⁄4 95 17 432 34 864 15 381 6 152 14 356 403 183
150 62
6
200 75 1905 37
8
1
⁄2 1588
1
30
⁄8 765
3
⁄4 959
1
4
⁄2 114
1
5
⁄2 140
21 533 41
1
⁄2 1054
16 406 7
1
⁄2 191
16 406 727 330
26 660 52 1321 17 432 9 229 21 533 1327 602
10 250 90 2286 453⁄4 1162 61⁄2 165 32 813 64 1626 18 457 101⁄4 260 25 635 2093 949
* Service clearance for check assembly from center.
†UL/FM approved backflow preventers must include UL/FM approved OSY.
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