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Wilkins 34-420XL 3/4-inch pressure vacuum breaker assembly, cast bronze body, FNPT threads, integral freeze-relief poppet.

Wilkins 420XL 3/4-inch Lead-Free Pressure Vacuum Breaker (FNPT)

Brand: Zurn Industries, LLC
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$351.86
$263.90
SKU 34-420XL
In Stock (12)

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The Wilkins 420XL pressure vacuum breaker assembly (model 34-420XL) delivers certified backflow protection for residential irrigation and potable water systems. Engineered for durability, the 420XL pairs a cast bronze, lead-free body with a modular internal design and an integral freeze-relief poppet to reduce freeze-related damage while maintaining reliable anti-siphon protection.

  • Compact 3/4-inch nominal size with female NPT (FNPT) connections for straightforward installation on standard piping.
  • Cast bronze body (ASTM B584) and 300-series stainless steel springs provide corrosion resistance and long service life.
  • Integral freeze-relief poppet releases pressure to reduce the risk of freeze damage during intermittent cold conditions.
  • Modular internals and full-port ball valve design simplify maintenance and minimize repair time in the field.
  • Rated for 175 psi working pressure and 140°F maximum temperature; hydrostatically tested to 350 psi for dependable performance.
  • Certified for potable water use: ASSE 1020, IAPMO/UPC, CSA and NSF/ANSI 372 (lead-free).

Factory documentation, repair parts lists, and installation instructions are available for download. The 34-420XL is an ideal choice for irrigation professionals and homeowners who need code-compliant backflow protection with built-in freeze relief and easy serviceability.

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Frequently Asked Questions

What size and connection type does the 34-420XL use?
3/4-inch nominal with female NPT (FNPT) threaded connections. Designed for standard residential irrigation piping.
How does the freeze-relief feature protect the valve?
An internal relief poppet releases pressure during freezing to reduce component damage. It provides limited freeze protection, not full winterization.
Is the 34-420XL approved for potable water and which standards?
Yes. Lead-free construction with ASSE 1020, IAPMO/UPC, CSA and NSF/ANSI 372 certifications for potable water applications.

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