1/2" Bronze Backflow Preventer Check Valve with Vent, Lead-Free
16 Available At All US Supply Locations

Apollo® 1/2" Lead-Free Bronze Double Check Valve – Compact Backflow Protection for Potable Water Lines
The Apollo® 1/2" Double Check Valve provides dependable protection against backflow caused by backpressure or backsiphonage in non-health hazard potable water systems. Designed to meet industry standards for residential and light commercial applications, this valve is a compact, lead-free solution engineered for performance, reliability, and ease of maintenance.
Constructed from corrosion-resistant bronze and equipped with independently acting internal checks, the valve ensures dual-layer protection for systems requiring code-compliant cross-connection control. It's well-suited for installations downstream of meters, on residential service lines, and in general plumbing systems where backflow protection is required but not classified as high hazard.
Product Highlights
- Lead-Free Bronze Construction – Compliant with NSF/ANSI 372 standards for potable water applications.
- Dual Independent Spring Checks – Each check operates separately to maximize system integrity and reliability.
- Low Pressure Loss – Designed to maintain efficient water flow while delivering certified protection.
- Modular Check Assemblies – Simplifies servicing and repair with removable internal components.
- Corrosion-Resistant Build – Withstands long-term exposure to treated municipal water and variable conditions.
- Compact Size – Ideal for confined installations, meter boxes, or inline retrofit work.
Specifications
- Size: 1/2" NPT
- Material: Lead-free bronze (C84400 or C89836)
- Check Valve Type: Double check, non-testable
- Pressure Rating: 175 PSI max working pressure
- Temperature Range: 33°F – 180°F
- Certifications: ASSE 1024, NSF/ANSI 61 & 372
- Warranty: 5-year manufacturer warranty
Installation Considerations
This valve is approved for horizontal installation and should be installed in accordance with local plumbing and backflow code requirements. While the unit is compact and straightforward to install for trained professionals, care must be taken to maintain directional flow, allow for access during maintenance, and ensure compatibility with other system components.
Designed for the Demands of the Trade
- Quick Maintenance – Internal components are serviceable without removing the valve from the line.
- Proven Durability – Engineered to withstand day-to-day system wear and exposure to chlorinated water supplies.
- Versatile Application – Commonly used in residential service connections, small commercial plumbing lines, and irrigation systems where reduced pressure zone protection is not required.
Backflow Protection You Can Count On
The Apollo® 1/2" Bronze Double Check Valve delivers reliable, code-compliant backflow protection in a compact footprint. Built from high-quality materials and backed by a five-year warranty, it’s a smart, professional-grade choice for contractors seeking performance, serviceability, and peace of mind on every install.
Specifications
| Weight | 1.310000 |
|---|---|
| Country of Manufacture | China |
| Length (inches) | 64 |
| Width (inches) | 32 |
| Height (inches) | 64 |
| Item Type | Check Valves |
| Brand | Apollo Valves |
| Low Lead Compliance | Yes |
| Manufacturer | Aalberts Integrated Piping Systems |
| MPN | 4ALF4A33AM |
| Sub Type | Backflow Preventer |
| Warranty | 2 year |
| Body Material | Forged Brass |
| Domestic/Import | Domestic |
| End Style | FNPT |
| Material | Brass |
| Media | Water |
| Nominal Size | 1/2 in |
| Pressure Rating | 175 PSI |
| Temperature Rating | 33 to 210 Deg F |
| Trim Material | Stainless Steel |
| Application | Hot or Cold Water Service |
| Includes | Stainless Steel Handles, Nuts |
| Side A | 1/2" |
| Item Returns | This item can be returned |
