Apollo 4A Series Reduced Pressure Backflow Preventer | 3/4" & 1" Lead-Free Bronze

Product Details

The Apollo 4A Series  Reduced Pressure Principle (RPZ) backflow preventer is a high-hazard protection device designed to safeguard potable water systems from both back-siphonage and backpressure. Available in 3/4" and 1" configurations, this assembly solves the danger of cross-contamination by utilizing a redundant dual-check system and a hydraulic relief valve. If a pressure drop occurs or a backflow event is detected, the unit immediately vents non-potable water to the atmosphere, ensuring that the main water supply remains pure. Crafted from bronze and built for easy maintenance, it is the ultimate choice for high-risk residential and commercial applications.

Key Features:

• Lead-Free Bronze Construction: Manufactured from domestic C89836 bronze, fully compliant with federal plumbing laws and NSF/ANSI 372.
• Modular Check Cartridges: Features "Captive Spring" technology, allowing for the quick and safe removal of internal checks for cleaning or replacement without special tools.
• SAE Flare Test Cocks: Equipped with top-mounted, easily accessible SAE test cocks that simplify the annual certification process and pressure testing.
• Corrosion-Resistant Hardware: Comes standard with stainless steel ball valve handles and nuts, providing superior longevity in damp or outdoor environments.

Specifications:

• Available Sizes: 3/4" (4A204A2F) and 1" (4A205A2F)
• Maximum Working Pressure: 175 psi
• Temperature Range: 33°F to 180°F
• Body Material: Bronze
• Approvals & Compliance:
  • ASSE 1013 Certified
  • CSA B64.4 Certified
  • NSF/ANSI 61 & 372
  • USC FCCC&HR Approved

Installation & Maintenance Tips:

• Horizontal Orientation: These models are designed for horizontal installation. Ensure there is a minimum of 12" clearance from the ground to the relief valve for proper drainage.
• Air Gap Drain: Always install with an appropriate air gap drain funnel to prevent local flooding if the relief valve activates during a pressure fluctuation.
• Pre-Installation Flush: Thoroughly flush all supply lines before installing the unit to prevent sand, silt, or pipe scale from damaging the silicone seat discs.

Common Uses/Applications:

• Commercial Irrigation: Required for sprinkler systems where fertilizers, pesticides, or injectors are used.
• Boiler Feed Lines: Prevents chemically treated boiler water from back-siphoning into the drinking water supply.
• Fire Sprinkler Systems: Often used on small-scale fire lines to isolate non-potable water from the municipal main.

Common Questions:

Q: What is the benefit of an RPZ over a Double Check (DC)?

A: An RPZ provides the highest level of protection because it includes a relief valve that will physically discharge water if the internal checks fail, whereas a DC does not vent to the atmosphere.

Q: Does the assembly include the shut-off ball valves?

A: Yes, the "A2F" designation confirms this is a complete assembly including two lead-free shut-off ball valves and the required test cocks.

Q: Can I service the relief valve without removing the whole unit?

A: Absolutely. The Apollo 4A series is designed for "in-line" serviceability, meaning all internal parts can be accessed through the top caps while the body remains piped in place.

With its American-made quality and modular, high-performance design, the Apollo 4A Series RPZ is the perfect solution for ensuring total water safety and long-term regulatory compliance.