Zurn Wilkins 460XL 1 in. Spill-Resistant Pressure Vacuum Breaker - 1-460XL
The Wilkins 460XL 1 in. Spill-Resistant Pressure Vacuum Breaker provides high-hazard backsiphonage protection for point-of-use applications. Its spill-resistant diaphragm and modular construction reduce start-up spillage and simplify service while meeting low-lead requirements.
Designed for indoor and outdoor point-of-use installations, the 460XL features 1 in. FNPT connections and a compact vertical mounting profile. Refer to the product specification and installation sheets for dimensions, maintenance, and replacement parts. Technical documents and repair parts lists are available with the product listing.
Features
- Cast bronze (ASTM B-584) low-lead body for corrosion resistance and long service life.
- Separate diaphragm seals the air inlet to minimize or eliminate start-up spillage.
- Rated for 150 PSI maximum working pressure and 180°F maximum working temperature.
- Hydrostatic test pressure 300 PSI; designed for constant pressure applications.
- FDA-approved silicone elastomers, polypropylene polymers and 300 series stainless steel springs.
- ASSE-listed and IAPMO/CSA certified; meets NSF/ANSI 61 and approved by the USC Foundation for Cross Connection Control.
What our Experts Think
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Premium spill-resistant design: The Zurn Wilkins 460XL 1 in. Spill-Resistant Pressure Vacuum Breaker is engineered to reduce or eliminate discharge during start-up, improving cleanliness in sensitive installations.
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Reliable back-siphonage protection: Built to protect potable water systems from contamination in both indoor and outdoor point-of-use applications.
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Commercial-grade construction: Cast bronze body with stainless steel springs and engineered elastomers ensures strong corrosion resistance and long service life.
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Constant pressure ready: Designed for systems that remain under pressure, making it suitable for modern irrigation and mechanical setups.
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Maintenance efficiency: Modular internal design simplifies servicing, reducing downtime and long-term maintenance costs.
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Code-compliant protection: Commonly specified to meet ASSE 1056, NSF/ANSI 61/372, and CSA certification requirements for potable water safety.
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Professional installer favorite: Frequently chosen for irrigation, fire protection, and high-risk plumbing applications where reliability and spill control matter most.
Q&A
Q: What is the Zurn Wilkins 1-460XL used for?
A: It protects potable water systems from back-siphonage in irrigation and other non-continuous pressure applications.
Q: What type of backflow preventer is the 460XL?
A: It is a Spill-Resistant Pressure Vacuum Breaker (PVB), designed to prevent contaminated water from being siphoned back into clean water lines.
Q: What does “spill-resistant” mean?
A: It reduces water discharge during operation or pressure changes, helping minimize nuisance spillage while maintaining reliable protection.
Q: Where is the 1-460XL typically installed?
A: Common in irrigation systems, commercial landscaping, and outdoor water applications where continuous pressure is not required.
Q: What are key features of the 1-460XL?
A: Durable bronze body, replaceable internal components, top-mounted test cocks, and a compact design for easier installation and servicing.
Q: Can it be used for continuous pressure systems?
A: No, it is not rated for continuous pressure; it should only be used in systems that are not constantly pressurized.
Maintenance Tips
- Inspect regularly for leaks, corrosion, and signs of wear around the bonnet and seals.
- Test annually to verify proper spill-resistant vacuum breaker operation and code compliance.
- Drain and winterize before freezing conditions to prevent internal damage.
- Keep air ports and vents clean and free of debris for proper function.
- Replace worn seals, O-rings, or internal components using approved repair kits as needed.
- Ensure proper installation orientation and maintain clear access for testing and maintenance.
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