Nibco NL7K004 Y-pattern Check Valve 1/4 Inch Fnpt 300 Wog

Product Description

The NIBCO NL7K004 is a Y-pattern check valve designed to allow one-directional flow and prevent backflow in piping systems. It features a 1/4 inch pipe size with female NPT (FNPT) connections on both ends, a bronze body, and a polytetrafluoroethylene (PTFE) seat seal. Rated at 300 WOG (water, oil, gas), it handles demanding service conditions up to 300 psi. This valve is installed by licensed plumbers and pipefitters in both commercial and industrial applications where reliable backflow prevention is required.

The NL7K004 is suited for use in water, oil, and gas piping systems where a compact, inline check valve is needed. The Y-pattern body design offers lower pressure drop compared to swing-type check valves and is appropriate for horizontal or vertical installations. Its bronze construction and PTFE sealing make it compatible with a range of fluid media including water and light oils. Typical installation scenarios include supply lines, equipment protection, and process piping in light industrial and commercial facilities.

Key Features

• Y-pattern body for reduced pressure drop and smooth flow characteristics
• 300 WOG pressure rating, suitable for water, oil, and gas service up to 300 psi
• Bronze body construction for corrosion resistance in plumbing and industrial environments
• PTFE seat seal provides reliable, low-friction seating across a wide temperature range
• FNPT x FNPT end connections for straightforward threaded installation
• Rated to 366 degrees F maximum operating temperature

Compatibility

Designed as an OEM-style replacement or new-installation check valve for 1/4 inch FNPT threaded piping systems in water, oil, and gas service.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and IFGC requirements where gas service is involved. Shut off and depressurize the system completely before removing or installing the valve. Use thread sealant or PTFE tape on all male NPT threads per standard practice. Verify that flow direction matches the arrow or markings on the valve body before final assembly.