Specifications

34
Tech Support: 855-ONE-ZURN
www.zurn.com
OptionsTypical InstallationX Ref
Model 975XL FNPT x FNPT end connections
Model 975XLTCU Test cocks up
Model 975LXL Less shut-off valves
Model 975XLS Supplied with wye strainer
Model 975XLU Supplied with union connections between shut-off
valves and the device
Model 975XLUS Same as 975XLU except supplied with wye strainer
Model 975XLSE Supplied with 90° elbows
Model 975XLP Purple access covers for reclaimed water
Model 975XLMS Integral supervisory switch
Model 975XLBMS Battery-powered integral supervisory switch
Model 975XLFDC Same as 2" size 975XL except supplied with
2
1
/
2
" female swivel inlet hose connection and
2
1
/
2
" male outlet hose connection, for temporary
water service from fire hydrant
Model 975XLFT Supplied with fast-test test cocks
Model 975XLSH Supplied with stainless steel handles
For Additional Information, reference WK-BPC catalog or visit
our web site.
Reduced Pressure Principle 975XL Series
Features Applications
• 3/4", 1", 1
1
/
4
", 1
1
/
2
", 2"
• Reduced pressure principle backflow preventer consisting of a pressure
differential relief valve located between two independently operated
spring-loaded wye type center guided check valves, wye pattern body
• Complete with two full port resilient seated ball valves for shut-off and
four resilient seated ball valve test cocks
• Bronze body construction
• Noryl
®
replaceable seats and silicone rubber check discs
• Entire unit serviceable in line
• Temperature range 33°F – 180°F
• Maximum pressure 175 psi
• With BSP threaded connections
• Available with stainless steel ball valve handles (optional)
• ASSE
®
Listed 1013, IAPMO
®
Listed, CSA
®
Certified, AWWA, UL
®
Classified
(Model 975LXL), C-UL
®
Classified (Model 975LXL)
• Approved by the Foundation for Cross-Connection Control and
Hydraulic Research at the University of Southern California
12" MIN
30" MAX
PROTECTIVE
ENCLOSURE
MODEL S
MODEL 975XL
STRAINER
OPTIONAL
WATER METER
INLET SHUT-OFF MODEL 850
AIR GAP
DRAIN
DIRECTION OF FLOW
Giving superior protection against both backpressure and backsiphonage in a high hazard ap-
plication is exactly what the Backflow Prevention professional expects, and that is exactly what
the Wilkins 975XL offers. Built around the time honored “Wye pattern” design, the 975XL is
loaded with the features that demanding professionals ask for. From the individual access cov-
ers for the three main components, to the use of all silicone elastomers and Noryl® polymers,
the 975XL is the feature loaded valve that the professionals demanded. When your high haz-
ard backflow installation demands the best RP available, you can rely on the Wilkins 975XL.
 Air gap (Model AG)
 Thermal expansion tank (Model XT)
 Soft seated check valve (Model 40XL)
 Water hammer arrestor (Model 1250)
Local codes shall govern installation requirements. To be installed in accordance with the manufacturers’ instructions and the latest edition of the Uniform
Plumbing Code. 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.
 Quick test set (QT-SET)
 Ball valve handle locks (BVHL)
 Test cock lock (Model TCL24)
 Ball valve monitor switch (Model BVMS)
Accessories
WILKINS WATTS CONBRACO FEBCO AMES HERSEY
975XL 009QT, 995, 40-200-A2 825Y,860 400B, 4000B FRPII
909QT, 909M1QT, 40-200-A1
919 ,009LF
Backflow Preventers