Specification

Zurn Industries, LLC | Wilkins
1747 Commerce Way, Paso Robles, CA U.S.A. 93446  Ph. 855-663-9876, Fax [phone]
In Canada | Zurn Industries Limited
3544 Nashua Drive, Mississauga, Ontario L4V 1L2  Ph. 905-405-8272, Fax [phone]
www.zurn.com
Rev. H
Date: 1/17
Document No. BF-350DA
Patent No. 5, 913, 331
Product No. Model 350DA
Model 350DA
Double Check Detector Assembly
Page 1 of 2
MODEL 350DAG SHOWN ABOVE
E
F
D
E
B
A
F
DC
B
A
Options
(Suf xes can be combined)
c - with OS & Y gate valves (standard)
c L - less shut-off valves (flanged body
connections)
c LM - less water meter
- with remote reading meter
- with gallon meter (standard)
c CFM - with cu ft meter
c CMM - with cu meter meter
c G - with groove end gate valves
c FG - with flanged inlet connection and grooved outlet
connection
c PI - with Post Indicator Gate Valve
c GF - with flanged inlet connection and grooved outlet
connection
c BG - with grooved end butterfly valves with integral
monitor switches (2 1/2" - 10")
c –509 - with AWWA C509 gate valves
Accessories
c Repair kit (rubber only)
c Thermal expansion tank (Model XT)
c OS & Y Gate valve tamper switch (OSY-40)
Attention:
Model 350DA (flange body) and Model 350ADA (grooved
body) have different lay lengths.
Application
Designed for installation on water lines in fire protection systems
to protect against both backsiphonage and backpressure of
polluted water into the potable water supply. Model 350DA
shall provide protection where a potential health hazard does
not exist. Incorporates metered by-pass to detect leaks and
unauthorized water use.
Standards Compliance
(Sizes 2 1/2" - 10" Horiz. & Vert.)
(12" Horizontal Only)
• ASSE® Listed 1048 (Sizes 2 1/2" thru 12")
• CSA® Certified B64.5 (Sizes 2 1/2" thru 8", & 12")
• AWWA Compliant C510 (Sizes 2 1/2" thru 12"), and C550
• UL® Classified (Sizes 2 1/2" thru 12")
• C-UL® Classified (Sizes 2 1/2" thru 12")
• FM® Approved (Sizes 2 1/2" thru 10")
• NYC MEA 147-99-M Vol 4 (2-1/2" - 10)
• Approved by the Foundation for Cross Connection
Control and Hydraulic Research at the University of Southern
California (Sizes 2 1/2" thru 12")
• Meets the requirements of NSF/ANSI 61*
*(0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)
By-Pass Back ow Assembly 3/4" Model 950XLD
Materials
Main valve body Ductile Iron ASTM A 536
Access covers Ductile Iron ASTM A 536
Coatings NSF Approved fusion epoxy finish
Internals Stainless steel, 300 Series
NORYL™
Fasteners Stainless Steel, 300 Series
Elastomers EPDM (FDA approved)
Buna Nitrile (FDA approved)
Polymers NORYL™
Springs Stainless Steel, 300 Series
Features
Sizes: 2 1/2", 3", 4", 6", 8", 10", 12"
Maximum working water pressure 175 PSI
Maximum working water temperature 140°F
Hydrostatic test pressure 350 PSI
End connections (Grooved for steel) AWWA C606
(Flanged) ANSI B16.1
Class 125
Dimensions & Weights (do not include pkg.)
NSF/ANSI 61