1-1/4" Brass Check Valve, Vertical, Lead-Free

Campbell 1-1/4" FNPT Spring Check Valve – Lead-Free Brass, Built for System Integrity

For professionals seeking consistent backflow prevention in potable water and general plumbing systems, the Campbell 1-1/4" FNPT Spring Check Valve offers dependable, code-compliant performance. Engineered with low-lead brass and a corrosion-resistant spring mechanism, this check valve is suitable for both residential and commercial installations where maintaining flow direction is critical.

With a fixed spring-assisted poppet design, it ensures reliable closure under variable pressures and eliminates reverse flow, protecting pumps, equipment, and system components.

Why It Belongs in Your System

• Low-Lead Brass Body – Complies with Safe Drinking Water Act requirements for potable water use.
• Spring-Loaded Operation – Provides automatic closure with minimal flow loss and ensures tight sealing even in low-flow conditions.
• Rated to 200 PSI – Suitable for higher-pressure lines and closed-loop systems.
• Temperature Limit: Up to 158°F – Ideal for hot and cold water applications.
• Female NPT Ends – Allows for secure integration into threaded systems.

Specifications

• Size: 1-1/4"
• Body Material: Low-lead brass
• Pressure Rating: 200 PSI max
• Temperature Range: Up to 158°F
• Dimensions: 4" L × 2-1/2" W × 2-1/2" H
• End Connections: FNPT x FNPT

Installation Notes

Threaded installation is straightforward, but we recommend applying thread sealant or PTFE tape and tightening with care to avoid damaging brass threads. Orientation must follow directional flow arrows on the valve body. While installable by experienced individuals, using a licensed plumber is the best way to ensure compliance with plumbing codes and proper system performance.

Application Scenarios

• Potable water supply lines
• Booster pump discharge protection
• Closed-loop HVAC systems
• Thermal expansion control in domestic water systems

Contractor Insight

This Campbell valve is a preferred option for backflow control where reliability and code compliance matter. Its compact form factor, strong pressure handling, and all-brass design make it a staple for professional-grade installations. Whether used in retrofit or new construction, it delivers solid, long-term performance.