ZURN 375XL Pressure Principle Installation Guide
- June 7, 2024
- ZURN
Table of Contents
Model 375XL
Reduced Pressure Principle Assembly
Application
Ideal for use where Lead-Free* valves are required. 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.
Standards Compliance
- ASSE® Listed 1013
- IAPMO® Listed
- CSA® Certified B64.4
- AWWA compliant C511
- Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
- UL® Classified (less shut-off valves only, 3/4″-2″)
- C-UL® Classified (less shut-off valves only, 3/4″-2″)
- Meets the requirements of NSF/ANSI 61*
- (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)
Materials
Housing Reinforced Nylon, FDA approved
Fasteners Stainless Steel, 300 Series
Elastomers Silicone (FDA Approved) Buna Nitrile (FDA Approved)
Internals Delrin, Nylon
Springs Stainless Steel, 300 series
Ball Valves Low Lead Cast Bronze, ASTM B 584
Struts Stainless Steel, 300 Series
Features
Sizes: 1/2″, 3/4″, 1″, 1-1/4″, 1-1/2″, 2″
Maximum working water pressure 175 PSI
Maximum working water temperature 180°F
Hydrostatic test pressure 350 PSI
End connections Threaded FNPT ANSI B1.20.1
Options
(Suffixes can be combined)
– with full port QT ball valves (standard)
S – with Model SXL lead-free bronze “Y” type strainer
FT – with integral male 45° flare SAE test fitting
AG – with air gap
SAG – with Model SXL lead-free bronze “Y” strainer and air gap
B – with black fusion epoxy coated ball valves & struts for theft
protection
Accessories
Repair kits
Thermal expansion tank (Mdl. XT)
Soft seated check valve (Mdl. 40XL2)
Shock arrester (Model 1260XL)
QT-SET Quick Test Fitting Set
Blow out / Flush fitting (RK34-375BOF (1/2″ or 3/4″), RK1-375BOF or
RK114-350-375BOF)
MODELS 375XLSE
Dimensions & Weights (do not include pkg.)
Rev. N
Date: 12/19
Document No. BF-375XL
Patent No. 7,784,483, & 7,905,250
Product No. Model 375XL
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Flow Characteristics ♦ Rated Flow (established by approval agencies)
MODEL 375XL 1/2″ – 1″ (STANDARD & METRIC)
FLOW
RATES (GPM)MODEL 375XL 1-1/4″ – 2″ (STANDARD & METRIC)
Typical Installation
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.
Relief Valve Discharge Rates
(Worst case condition – If 1st check or relief valve is lodged wide open)
MODEL 375XLSAG (SHOWN)
INDOOR INSTALLATION OUTDOOR INSTALLATION
Specifications
The Reduced Pressure Principle Backflow Preventer shall be certified to NSF/ANSI 61, ASSE® Listed 1013, rated to 180°F, and supplied with full port ball valves. The main body shall be Nylon and the seat disc elastomers shall be silicone. If installed indoors, the installation shall be supplied with an air gap adapter. The Reduced Pressure Principle Backflow Preventer shall be a ZURN WILKINS Model 375XL.
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
7900 Goreway Drive, Unit 10, Brampton, Ontario L6T 5W6,
877-892-5216
**WWW.Zurn.com
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