Nibco NL740V6 Bronze Y-pattern Check Valve 1/2 in Fnpt

Product Description

The NIBCO NL740V6 is a bronze Y-pattern check valve designed for 1/2 inch pipe connections with female NPT (FNPT) inlets and outlets on both ends. It prevents backflow in pressurized piping systems, allowing flow in one direction only. Rated at 200 psi WOG (Water, Oil, Gas) and capable of handling temperatures up to 353 degrees F, this valve suits a wide range of plumbing, hydronic, and light industrial applications. The Viton seal provides resistance to oils, fuels, and elevated temperatures. Licensed plumbers and pipefitters are the primary installers.

The NL740V6 is suited for residential and light commercial plumbing and hydronic heating systems where backflow prevention is required on 1/2 inch lines. The Y-pattern body design reduces pressure drop compared to swing-type check valves, making it a practical choice for systems where flow efficiency matters. Its FNPT x FNPT end connections allow straightforward installation into standard threaded pipe runs without additional adapters in most configurations.

Key Features

• Y-pattern body reduces flow restriction and pressure drop
• Bronze body construction offers corrosion resistance in water and gas service
• Viton seal material compatible with oils, fuels, and elevated-temperature fluids
• 200 psi WOG pressure rating for versatile service conditions
• Maximum operating temperature of 353 degrees F
• FNPT x FNPT end connections for direct threaded pipe installation

Compatibility

Designed as an OEM-style replacement or new-installation check valve for 1/2 inch threaded pipe systems in plumbing, hydronic heating, and light industrial applications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and the IPC. Shut off system pressure and drain the line before removing or installing any valve. Apply thread sealant or PTFE tape to male threads before making up the FNPT connections. Verify flow direction markings on the valve body before completing installation.