Submittal Sheet

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. A
Date: 3/12
Document No. BF-420XL
Product No. Model 420XL
Model 420XL
Pressure Vacuum Breaker Assembly
with Integral Anti-Freeze Relief Valve
Page 1 of 2
Application
Ideal for use where Lead-Free* valves are required.
Designed for installation on potable water lines to
protect against backsiphonage of contaminated
water into the potable water supply. Supplied with
an integral anti-freeze relief valve to reduce the risk
of valve damage under intermittent, non-seasonal
freezing conditions. Designed for use under continu-
ous pressure. Assembly shall provide protection
where a potential health hazard exists.
Standards Compliance
• ASSE® Listed 1020
• IAPMO® Listed
• CSA® Certified
• Approved by the Foundation for Cross Connection
Control and Hydraulic Research at the University of
Southern California
LEAD PLUMBING LAW COMPLIANCE
*(0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)
• Lead Plumbing Law Certified by IAPMO R&T
Materials
Main valve body Cast Bronze ASTM B 584
Elastomers Silicone (FDA Approved)
Buna Nitrile (NSF Listed)
Polymers Polypropylene (FDA Ap-
proved)
Delrin™ (NSF Listed)
Noryl™ (NSF Listed)
Springs Stainless Steel, 300 Series
Features
Sizes: 3/4" , 1"
Maximum working water pressure 175 PSI
Maximum working water temperature 140°F
Hydrostatic test pressure 350 PSI
Threaded connections ANSI B1.20.1
Integral anti-freeze relief valve
Replaceable thermoplastic modular cartridge
Dimensions & Weights (do not include pkg.)
Options
(Suffixes can be combined)
c - with full port QT ball valves (standard)
Accessories
c Repair kit (complete)
c Repair kit (rubber only)
c Repair kit (freeze kit)
c Water hammer arrester (Model 1250XL)
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" # $ % & ' " # $ ( ) % $ ( # $ ( & * " ( " # ( ' + ) $ (  *
( % , ) ( , # ( ' % & % $ ( , # ( ' ( % , $ ( # % ( ( $ , %  "
B
C
A
WILKINS
420XL PVB