Nibco NL740V4 Y-pattern Check Valve 1/4 Inch Fnpt Bronze

Product Description

The NIBCO NL740V4 is a Y-pattern check valve designed to allow one-directional fluid flow while preventing backflow in piping systems. Built with a bronze body and Viton seal, it handles working pressures up to 200 psi (WOG) and temperatures up to 353 degrees F. The 1/4 inch FNPT x FNPT end connections make it straightforward to thread into existing pipelines. Plumbers and pipefitters install this valve in commercial and industrial plumbing, HVAC hydronic circuits, and light industrial fluid systems where backflow prevention is required on smaller-diameter lines.

The NL740V4 is suited for residential and light commercial applications where a compact, reliable check valve is needed on a 1/4 inch line. The Y-pattern body design provides lower pressure drop compared to swing-type configurations, making it practical in systems where flow efficiency matters. FNPT x FNPT connections allow direct inline installation without additional fittings in most threaded piping assemblies. This valve is appropriate for water, oil, and gas service within its rated pressure and temperature limits.

Key Features

• Y-pattern body design for reduced inline pressure drop
• Bronze body construction for corrosion resistance in plumbing and HVAC applications
• Viton seal material provides compatibility with a range of fluid media and elevated temperatures
• 200 psi WOG (Water, Oil, Gas) working pressure rating
• 1/4 inch FNPT x FNPT connections for direct threaded inline installation
• Manufactured under ISO 9001:2008 quality standards

Compatibility

Designed as an OEM-style replacement or new-installation check valve for 1/4 inch threaded piping systems in plumbing, hydronic, and light industrial applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and the IPC. Shut off system pressure and drain the line before removing or installing any inline valve. Apply appropriate thread sealant to FNPT connections and avoid over-tightening, which can crack bronze fittings. Verify flow direction arrow on the valve body aligns with intended flow direction before completing installation.