Zurn 1 in. PVB Pressure Vacuum Breaker - Bronze, Lead-Free - 4ALF505A2F
Reliable 1 in. pressure vacuum breaker (PVB) engineered for potable water protection in irrigation and light commercial systems. The bronze, lead-free assembly combines durable construction with serviceable internals for seasonal maintenance and long service life.
This model is intended for vertical installation with inlet at the bottom and requires clearance for access to test cocks and shutoff valves. It is listed to recognized potable‑water standards (see manufacturer datasheet for full approvals and sizing) and is commonly used by contractors for irrigation, landscape, and light commercial backflow protection. For code compliance, installation and testing should be carried out by a licensed plumber or certified backflow technician; refer to the product submittal sheet for dimensions, weight, and required clearances.
Features
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Bronze lead‑free body: corrosion‑resistant bronze construction with lead‑free components for potable water applications.
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Union/ball valve shutoffs: integrated union‑end ball valves with stainless steel handles and nuts for positive shutoff and easy isolation.
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SAE threaded test cocks: standard SAE/NPT test cocks and threaded protectors for convenient testing and draining.
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Serviceable cartridge: top‑access modular cartridge with replaceable seats and captured springs for fast field service.
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Durability and protection: built‑in freeze‑resistant relief valve, low pressure loss design, and corrosion‑resistant components.
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Performance ratings: nominal 1 in. size, 150 PSI working pressure and an operating range suitable for common irrigation temperatures.
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Manufacturer support: compatible repair kits and a 5‑year limited warranty from the manufacturer.
What our Experts Think
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Reliable 1-inch lead-free Pressure Vacuum Breaker (PVB) designed to prevent backsiphonage in irrigation systems.
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Lead-free bronze construction offers excellent durability, corrosion resistance, and potable water compliance.
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Ideal for residential and light commercial sprinkler and landscape irrigation systems.
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Provides dependable backflow protection for high-hazard, non-potable water applications.
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Engineered for easy testing and maintenance with accessible test cocks and shut-off valves.
- Compact, proven design simplifies installation while delivering long-lasting performance.
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Meets key industry standards for safety and code compliance, making it a trusted choice for professional installations.
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A dependable solution for homeowners and contractors seeking durable, low-maintenance irrigation backflow protection.
Q&A
Q: What is the Zurn 1 in. PVB Pressure Vacuum Breaker (4ALF505A2F)?
A: A 1-inch lead-free bronze pressure vacuum breaker (PVB) designed to protect potable water systems from backsiphonage in irrigation and other high-hazard non-potable water applications.
Q: Where is the 4ALF505A2F commonly used?
A: It is ideal for residential and commercial irrigation systems, landscape watering, and other applications requiring reliable backflow prevention.
Q: What are its key features?
A: Lead-free bronze body, modular replaceable check valve cartridge, built-in freeze-resistant relief valve, stainless steel ball valve handles, corrosion-resistant construction, and SAE threaded test cocks for easy testing and maintenance.
Q: What are the operating specifications?
A: It features 1" FNPT connections, a maximum working pressure of 150 PSI, and an operating temperature range of 33°F to 140°F.
Maintenance Tips
- Inspect regularly for leaks, corrosion, and visible damage.
- Test the pressure vacuum breaker annually to ensure proper backflow protection.
- Drain and winterize before freezing temperatures to prevent freeze damage.
- Keep air vents and valve components clean and free of debris.
- Replace worn seals and internal parts with compatible replacement kits as needed.
- Ensure the assembly remains accessible for routine inspection, testing, and maintenance.
Damage 
Loss 
Theft 
