ES-709DCDA
For Non-Health Hazard Applications
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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:
709DCDAOSY
• 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.
Check Assembly
Module
Test Cock
Cover
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.
Features
• Body construction fused epoxy coated cast iron
• Replaceable bronze seats
Seat
Disc
• Maximum flow at low pressure drop
• Compact for economy combined with performance
• Design simplicity for easy maintenance
• Furnished with 5⁄8" x 3⁄4" (16 x 19mm) bronze meter
• No special tools required for servicing
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.
Specifications
A Double Check Detector Assembly shall be installed on fire
protection systems when connected to a potable water supply. Degree of hazard present is determined by the local
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 Cross-Connection Control and Hydraulic
Research at the University of Southern California. Assembly
shall be a Watts Regulator Company Series 709DCDA.
Now Available
WattsBox Insulated Enclosures.
For more information, send for literature ES-WB.
IMPORTANT: INQUIRE WITH GOVERNING AUTHORITIES
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 Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
Pressure – Temperature
Materials
Body:
Epoxy coated cast iron
Seat:
Bronze
Temperature Range: 33˚F – 110˚F ( 0.5˚ – 43˚C) continuous,
140˚F (60˚C) intermittent
Disc Holder:
Bronze
Maximum Working Pressure: 175psi (12.1bar)
Trim:
Stainless steel
Standards
Check Valve Discs: Rubber
Test Cocks:
AWWA Standard C510
Bronze
Approvals
Models
Suffix:
OSY - UL/FM outside stem and yoke resilient seated gate
valves
B.64
1048
LF - 4" – 10" (100 – 250mm) without shutoff valves
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.
Dimensions – Weights
Factory Mutual approved 4" – 10" (100-250mm) vertical
“flow up”.
CFM - cubic feet per minute meter
GPM - gallons per minute meter
U*
C
(open)
D
E
L
R
T
A
SIZE (DN)
DIMENSIONS
A
D
C
E
WEIGHT
L
R
T
U*
In.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
3
4
6
8
10
80
100
150
200
250
40
52
621⁄2
75
90
1016
1321
1588
1905
2286
187⁄8
223⁄4
301⁄8
373⁄4
453⁄4
479
578
765
959
1162
31⁄2
33⁄4
41⁄2
51⁄2
61⁄2
89
95
114
140
165
12
17
21
26
32
305
432
533
660
813
24
34
411⁄2
52
64
610
864
1054
1321
1626
14
15
16
17
18
356
381
406
432
457
3
6
71⁄2
9
101⁄4
76
152
191
229
260
14
14
16
21
25
356
356
406
533
635
* Service clearance for check assembly from center.
†UL/FM approved backflow preventers must include UL/FM approved OSY.
W/OSY† gates
lbs.
kgs.
190
403
727
1327
2093
86
183
330
602
949
Capacity
*Typical maximum system flow rate (7.5 ft./Sec.) **UL rated flow
3" (80mm)
8" (200mm)
**
96 14
kPa psi
**
Pressure Drop
Pressure Drop
kPa psi
69 10
41
6
14
2
0
0
0
0
100
380
200
760
5
1.5
300
1140
400
1520
7.5
2.3
15
4.6
96 14
41
6
14
2
0
0
gpm
lpm
fps
mps
0
0
400
1520
800
3040
5
1.5
Pressure Drop
96 14
6
14
2
0
0
0
0
100
380
200
760
5
1.5
kPa psi
**
300
1140
7.5
2.3
400
1520
500
1900
15
4.6
600
2280
gpm
lpm
fps
mps
6" (150mm)
**
Pressure Drop
96 14
**
69 10
41
6
14
2
0
0
0
0
200
760
400
1520
5
1.5
600
2280
800
3040
7.5
2.3
Flow
**
96 14
2000
7600
15
4.6
4000 gpm
15200 lpm
fps
mps
1000
3800
1200
4500
1400
5320
15
4.6
gpm
lpm
fps
mps
**
69 10
41
6
14
2
0
0
0
0
400
1520
800
3040
1200
4560
5
1.5
1600
6080
2000
7600
7.5
2.3
Flow
Flow
kPa psi
1600
6080
10" (250mm)
4" (100mm)
69 10
41
1200
456
7.5
2.3
Flow
Pressure Drop
**
**
69 10
Flow
kPa psi
**
2400
9120
2800
10,640
3200 3600
4000
12,160 13,680 15200
15
4.6
gpm
lpm
fps
mps
For additional information, visit our web site at: www.watts.com
A Watts Water Technologies Company
ES-709DCDA
0638
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
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