1/2" Brass Swing Check Valve, Lead-Free, Copper x Copper

NIBCO® Ring Check® Valve – 1/2" Bronze Spring-Loaded Backflow Prevention Valve

The NIBCO® Ring Check® Valve is engineered to deliver dependable backflow protection in potable water systems. Constructed from lead-free, dezincification-resistant (DZR) performance bronze, this 1/2" lift check valve meets or exceeds applicable ASTM and NSF/ANSI standards for use in residential, commercial, and light industrial water supply lines.

Its spring-assisted self-closing disc provides reliable backflow prevention by closing automatically when downstream pressure drops or reverse flow is detected. Designed for inline installation in either horizontal or vertical (upward flow only) orientations, this valve supports solder-end connections for a secure, permanent fit in copper piping systems.

Product Features

• Lead-Free Bronze Body – Manufactured from ASTM B584 DZR bronze for corrosion resistance and potable water compliance.
• Spring-Assisted Disc – Ensures prompt closure to prevent reverse flow and protect system integrity.
• Solder End Connections – Designed for sweat fitting into copper water lines using standard soldering techniques.
• Versatile Installation – Suitable for vertical or horizontal installations (flow must be upward in vertical orientation).
• Reliable Sealing – Tight shutoff with low cracking pressure to maintain system efficiency.

Technical Specifications

• Nominal Size: 1/2 inch
• End Connections: Copper sweat (solder ends)
• Pressure Rating: 250 psi (non-shock cold water)
• Temperature Rating: Up to 300°F
• Pressure Class: 125 lb
• Material: Lead-Free DZR Bronze, ASTM B584 Alloy C89836
• Certifications: NSF/ANSI 61 & 372, Lead-Free
• Warranty: 5-Year Limited

Installation Considerations

This valve is intended for solder installation into copper tube lines. Apply heat evenly and avoid overheating to preserve internal components. Always install in the direction of flow as indicated by the body arrow. Suitable for service in domestic water lines, backflow loops, hydronic circuits, and booster pump discharges. Adherence to local plumbing codes and best practices is essential. Licensed professional installation is strongly recommended for code compliance and optimal system performance.

Application and Use Cases

The NIBCO® Ring Check® Valve is well-suited for applications where passive backflow prevention is required without a complex assembly. Common uses include potable water distribution systems, closed-loop hydronic heating circuits, and domestic pump lines. Its compact form factor, spring-loaded design, and lead-free certification make it an excellent fit for projects requiring code-compliant performance and minimal maintenance.

Summary of Benefits

• Backflow Protection – Automatic, spring-loaded shutoff
• Code-Compliant – Certified lead-free and NSF-approved
• Long-Term Durability – DZR bronze resists corrosion and dezincification
• Versatile Installation – Works in vertical or horizontal orientation

Trusted Performance in Demanding Systems

Built to NIBCO®’s high standards for quality and reliability, the Ring Check® Valve delivers proven performance where it matters most—protecting water systems from contamination and pressure damage. Whether used in residential builds or commercial installations, this valve supports long-term system integrity and contractor confidence.