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. E
Date: 8/16
Document No. BF-475- 475V-212&3
Patent No. 5,913,331
Product No. Model 475-475V
Model 475/475V
Reduced Pressure Principle Assembly
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Options (Suffixes can be combined)
c - with NRS shut-off valves (standard)
c FSC - with epoxy coated wye type strainer
(flanged only)
c G - with groove end connections
c FG - with flanged inlet connection and
grooved outlet connection
c L - less shut-off valves (flanged body connections)
c OSY - with OS & Y gate valves
c MS - with Integral Relief Valve Monitor Switch
c V - vertical flow up configuration
c BG - with grooved end butterfly valves with
integral supervisory switches
c –509 - with AWWA C509 gate valves
Accessories
c Repair kit (rubber only)
c Thermal expansion tank (Model XT)
c Valve setter (Model FLS or MJS or MJFS)
c Gate valve tamper switch (OSY-40)
c  Air gap (Use Model AG-6)
c QT-SET Quick Test Fitting Set
c Electronic Solenoid Timer (Model EST)
C
D
B
A
F
G
VENT
A
E
C
D
Application
Designed for installation on potable water lines to protect against
both backsiphonage and backpressure of contaminated water
into the potable water supply. Assembly shall provide protection
where a potential health hazard exists. The Model 475 is for
applications requiring vertical flow up and vertical flow down.
The Model 475V is for applications requiring vertical flow up.
Ideal for use where lead-free* valves are required.
Standards Compliance
• ASSE® Listed 1013
• AWWA Compliant C511, and C550
• CSA® Certified
• IAPMO® Listed
• UL® Classified
• C-UL® Classified
• FM® Approved
• NYC MEA 468-99-M VOL 4
• Approved by the Foundation for Cross Connection
Control and Hydraulic Research at the University of
Southern California
• Meets the requirements of NSF/ANSI 61*
*(0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)
Materials
Main valve body Ductile Iron ASTM A 536 Grade 4
Access covers Ductile Iron ASTM A 536 Grade 4
Coatings FDA 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
Sensing line Stainless steel, braided hose
Features
Sizes:  2 1/2", 3"
Maximum working water pressure 175 PSI
Maximum working water temperature 140°F
Hydrostatic test pressure 350 PSI
End connections (Grooved for steel pipe) AWWA C606-87
(Flanged) ANSI B16.1
Class 125
Dimensions & Weights (do not include pkg.)
Relief Valve discharge port:
2 1/2” - 6” - 2.75 sq. in.
NSF/ANSI 61