HomeMy WebLinkAbout1st on main backflow submittalZurn Industries, LLC | Wilkins
1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph. 855-663-9876, Fax 805-238-5766
In Canada | Zurn Industries Limited
3544 Nashua Drive, Mississauga, Ontario L4V 1L2 Ph. 905-405-8272, Fax 905-405-1292
www.zurn.com
Rev. E
Date: 12/13
Document No. BF-375AST
Patent No. 5, 913, 331
Product No. Model 375AST
Model 375AST
Reduced Pressure Principle Assembly
Page 1 of 2
Relief Valve
discharge port:
2 1/2" - 6" - 2.75 sq. in.
8" - 10" - 3.69 sq. in.
Application
Designed for installation on potable water lines to protect
against both backsiphonage and backpressure of contami-
nated water into the potable water supply. The Model 375AST
provides protection where a potential health hazard exists.
Ideal for use where lead-free* valves are required.
Standards Compliance
• ASSE® Listed 1013
• AWWA Compliant C511 (with gates only), and C550
• FM® Approved
• UL® Classified
• C-UL® Classified
• CSA® Certified
• IAPMO® Listed
• Approved by the Foundation for Cross Connection Control
and Hydraulic Research at the University of Southern Cali-
fornia
• NSF® Listed-Standard 61, Annex G*
• Certified to NSF/ANSI 372* by IAPMO R&T
*(0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)
Materials
Main Valve Body 304L Stainless steel
Access covers 304L Stainless steel
Coatings FDA Approved electrostatic epoxy finish
Internals Stainless steel, 300 Series
NORYL™, NSF Listed
Fasteners & Springs Stainless Steel, 300 Series
Seal rings EPDM (FDA approved)
O-rings Buna Nitrile (FDA approved)
Sensing line Stainless Steel, braided hose
Features
Sizes: 2 1/2", 3", 4", 6", 8", 10"
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.)
MODEL
375AST with
NRS & FSC
option
MODEL
375AST with
BG option
G
B
A
H
D
F
E
G
B A
C D
F
E
Options
(Suffixes can be combined)
- with flanged end NRS gate valves (standard)
FSC - with epoxy coated wye type strainer (flanged only)
G - with grooved end NRS gate valves
GF - with grooved inlet gate connection and flanged
outlet gate connection
FG - with flanged inlet gate connection and grooved
outlet gate connection
MS - with Integral Relief Valve Monitor Switch
OSY - with flanged end OS&Y gate valves
OSYG - with grooved end OS&Y gate valves
BG - with grooved end butterfly valves with integral
supervisory switches (2-1/2" - 6")
BF - with flanged end butterfly valves with integral
supervisory switches (2-1/2" - 6")
BGVIC - with grooved end butterfly valves with integral
supervisory switches (8" - 10")
Accessories
Repair kit (rubber only)
Thermal expansion tank (Model XT)
OS & Y Gate valve tamper switch (OSY-40)
Air gap (Model AG)
Electronic Solenoid Timer (Model EST)
QT-SET Quick Test Fitting Set
ഌFlow Characteristics
Zurn Industries, LLC | Wilkins
1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph. 855-663-9876, Fax 805-238-5766
In Canada | Zurn Industries Limited
3544 Nashua Drive, Mississauga, Ontario L4V 1L2 Ph. 905-405-8272, Fax 905-405-1292
www.zurn.com Page 2 of 2
Typical Installation
Local codes shall govern installation requirements. Unless
otherwise specified, the assembly shall be mounted at
a minimum of 12" (305mm) and a maximum of 30" (762mm)
above adequate drains with sufficient side clearance for
testing and maintenance. The installation shall be made so
that no part of the unit can be submerged.
Speci cations
The Reduced Pressure Principle Backflow Prevention Assembly shall be certified to NSF/ANSI 372, ASSE® Listed 1013, and
supplied with full port gate valves. The main body and access cover shall be 304L Stainless Steel, the seat ring and check
valve shall be NORYL™, the stem shall be stainless steel (ASTM A 276) and the seat disc elastomers shall be EPDM. The
checks and the relief valve shall be accessible for maintenance without removing the device from the line. The Reduced Pres-
sure Principle Backflow Prevention Assembly shall be a WILKINS Model 375AST.
ZURN WILKINS MODEL 375AST
OUTDOOR HORIZONTAL INSTALLATION
DIRECTION OF FLOW
PROTECTIVE
ENCLOSURE
12” MIN.
30” MAX.