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. B
Date: 12/13
Document No. BF-975XLU
Product No. Model 975XLU
Model 975XLU
Reduced Pressure Principle Assembly
with Union Ball Valves
Page 1 of 2
A
B
G
E
F
D
C
Options
(Suffixes can be combined)
c  - with full port QT ball valves (standard)
c  BMS - with battery operated monitor switch
c  MS - with integral relief valve monitor switch
c  S - with bronze "Y" type strainer
Accessories
c Air gap
c Repair kits (rubber only)
c Thermal expansion tank (Mdl. XT)
c Soft seated check valve (Model 40XL2)
c Shock arrester (Model 1250XL)
c QT-SET Quick Test Fitting Set
Application
Designed for installation on water lines to protect against both
backsiphonage and backpressure of contaminated water into
the potable water supply. The Model 975XLU provides protec-
tion where a potential health hazard exists.
Standards Compliance
(Includes sizes 3/4”, 1”, 1-1/2”, 2”)
• ASSE® Listed 1013
• IAPMO® Listed
• CSA® Certified
• AWWA compliant C511
• NYC MEA 425-89-M VOL 3
• Approved by the Foundation for Cross Connection
Control and Hydraulic Research at the University of
Southern California
Materials
Main valve body Cast Bronze ASTM B 584
Access covers Cast Bronze ASTM B 584
Fasteners Stainless Steel, 300 Series
Elastomers Silicone (FDA approved)
Buna Nitrile (FDA approved)
Polymers Noryl™, NSF Listed
Springs Stainless Steel, 300 series
Features
Sizes: 3/4", 1", 1-1/4", 1-1/2", 2"
Maximum working water pressure 175 PSI
Maximum working water temperature 180°F
End connections Threaded ANSI B1.20.1
Relief Valve discharge port:
3/4” - 1” - 0.63 sq. in.
1 1/4” - 2” - 1.19 sq. in.
Dimensions & Weights (do not include pkg.)