Wilkins 420XL Pressure Vacuum Breaker Assembly with Integral Anti-Freeze Relief Valve - 1"

Wilkins 420XL Pressure Vacuum Breaker Assembly with Integral Anti-Freeze Relief Valve - 1"

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 continuous pressure. Assembly shall provide protection where a potential health hazard exists.

FEATURES

• Maximum working water pressure 175 PSI
• Maximum working water temperature 140°F
• Hydrostatic test pressure 350 PSI
• Threaded connections ANSI B1.20.1

MATERIALS

• Main valve body - Low Lead Cast Bronze ASTM B 584
• Elastomers - Silicone (FDA approved) Buna Nitrile (NSF approved)
• Polymers - Polypropylene (FDA approved) Delrin™ (NSF Listed) Noryl™ (NSF Listed)
• Springs - Stainless steel, 300 series 

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
• Certified to NSF/ANSI 372* by IAPMO R&T  *(0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)

420 Series Information
(PDF: 97 KB)