Apollo Valves, 4ALF505A2F, Pressure Vacuum Breaker, 1 in, FPT - female thread conical (NPT), Bronze

Backflow Protection You Can Count On – Apollo® Model PVB 4A Pressure Vacuum Breaker

The Apollo® PVB 4A Pressure Vacuum Breaker is designed to protect potable water systems from back-siphonage caused by negative pressure. Ideal for residential and light commercial irrigation systems, this compact, durable unit meets all relevant standards for atmospheric vacuum breakers while offering long-term reliability and ease of maintenance.

Engineered for Performance and Serviceability

This pressure vacuum breaker features a corrosion-resistant bronze body, top-entry access for internal servicing, and a modular check valve cartridge for quick, tool-free replacements. The built-in relief valve is designed to resist freeze damage under typical system conditions, making this unit well-suited for variable climates and seasonal installations.

Product Advantages

• Bronze Body Construction – Built from lead-free alloys for strength, corrosion resistance, and code compliance.
• Modular Check Cartridge – Preassembled internal check valve simplifies field maintenance and replacement.
• Integrated Freeze-Resistant Relief Valve – Offers added protection in colder environments.
• Low Pressure Drop – Engineered for minimal flow restriction while maintaining protection standards.
• Test Cocks with Protectors – Allows for certified testing and seasonal draining with enhanced durability.
• Stainless Steel Ball Valve Handles – Resists corrosion and provides long service life under outdoor exposure.
• Compact Profile – Fits easily into limited space configurations and retrofits.

Specifications

• Model: PVB 4A
• Size: Available in 1/2" – 2" NPT
• Body Material: Lead-Free Bronze (C87850 or equivalent)
• Max Operating Pressure: 150 PSI
• Max Temperature: 140°F
• Certifications: ASSE 1020, CSA B64.1.2, IAPMO Listed
• Orientation: Vertical only

Installation Notes

Proper installation requires a vertical orientation with the inlet at the bottom and clearance for access to test cocks and shutoff valves. While no specialized tools are needed, adherence to local backflow prevention regulations and inspection schedules is essential. It is recommended that a licensed plumber or certified backflow technician perform the installation and testing.

For the Professional

The Apollo® PVB 4A is built with contractors in mind. Its compact form, serviceable internals, and rugged hardware simplify seasonal installs and annual certifications. Ideal for use on lawn irrigation systems, commercial landscaping lines, or outdoor hose bibbs that require reliable backflow prevention.

Choose Proven Protection

Install the Apollo® Model PVB 4A Pressure Vacuum Breaker for dependable, code-compliant backflow protection. Designed to perform in the field, season after season, this unit gives contractors peace of mind and end users long-term reliability.