Installation Guide

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. K
Date: 1/17
Document No. BF-350
Product No. Model 350
Model 350
Double Check Valve Assembly
Page 1 of 2
Options
(Suffixes can be combined)
c - with NRS shut-off valves (standard)
c  FSC - with epoxy coated wye type strainer
c (flanged only 2-1/2"-10")
c G - with groove end gate valves (2-1/2" - 10")
c  GF - with grooved inlet connection and flanged
outlet connection (2-1/2" - 10")
c  FG - with flanged inlet connection and grooved
outlet connection (2-1/2" - 10")
c L - less shut-off valves (flanged body connections)
c OSY - with OS & Y gate valves
c PI - Post Indicator gate valve
c  BG - with grooved end butterfly valves with integral
supervisory 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 350 (flange body) and 350A
(grooved body) have different lay lengths.
Application
Designed for installation on potable water lines to protect
against both backsiphonage and backpressure of polluted wa-
ter into the potable water supply. The Model 350 shall provide
protection where a potential health hazard does not exist. Ideal
for use where lead-free* valves are required.
Standards Compliance : (Sizes 2 1/2"-10" Horiz. & Vert.)
(Size 12" horizontal)
• ASSE® Listed 1015
• CSA® Certified B64.5
• IAPMO® Listed
• AWWA Compliant C510, and C550
• UL® Classified
• C-UL® Classified
• FM® Approved (2 1/2" - 10")
• Approved by the Foundation for Cross Connection
Control and Hydraulic Research at the University of Southern
California
• NYC MEA 50-01-M (2 1/2" - 3")
• NYC MEA 297-98-M (4" - 6")
• NYC MEA 316-01-M (8" - 10")
• Meets the requirements of NSF/ANSI 61*
*(0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)
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
Seal ring EPDM (FDA approved)
O-ring Buna Nitrile (FDA approved)
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 pipe) AWWA C606
(Flanged) ANSI B16.1
Class 125
Dimensions & Weights (do not include pkg.)
E
B
E
F
D
C
B
A
G
A
F
D
C
MODEL 350 OSYG SHOWN ABOVE
NSF/ANSI 61