Parker 6F-C6L-1-BN-B Check Valve 3/8 Inch Fnpt Brass

Product Description

The PARKER 6F-C6L-1-BN-B is an inline check valve designed to allow one-directional fluid or gas flow while preventing backflow in pressurized piping systems. Built with a brass body and a nitrile rubber seal, it handles a maximum working pressure of 3000 psi and opens at a crack pressure of 1.00 psi. The stainless steel spring provides consistent, corrosion-resistant actuation across a wide range of service conditions. This valve suits plumbing, HVAC, and industrial fluid-handling applications where reliable backflow prevention is required. It is installed by licensed plumbers, pipefitters, and HVAC technicians working on pressurized systems.

The 6F-C6L-1-BN-B is sized for 3/8 inch pipe with female NPT connections on both ends, making it suitable for inline installation in residential and light commercial systems. The FNPT x FNPT configuration threads directly into standard NPT-tapped fittings or manifolds. Its compact brass construction makes it a practical fit for hydraulic lines, compressed air circuits, refrigerant-adjacent fluid circuits, and potable or process water systems where backflow prevention is code-required or operationally necessary.

Key Features

• Brass body construction offers corrosion resistance and durability in fluid and gas service
• Nitrile rubber seal provides reliable seating and compatibility with a broad range of media
• Stainless steel spring ensures consistent crack pressure performance over service life
• 3/8 inch FNPT x FNPT end connections thread directly into standard NPT fittings
• 3000 psi maximum working pressure suits demanding pressurized system applications
• 1.00 psi crack pressure allows flow initiation at low differential pressure

Compatibility

Designed as an OEM-style inline check valve for 3/8 inch NPT piping systems in plumbing, HVAC, and industrial fluid-handling applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable codes such as the IPC or IFGC. Depressurize and isolate the system before removing any existing valve or fitting. Apply appropriate thread sealant to NPT connections and tighten to a snug, leak-free fit without over-torquing brass fittings. Verify flow direction against system design before pressurizing the line.