Specialty Mfr 6960590 Inline Check Valve 1/4 in Fnpt Mnpt

Product Description

The SPECIALTY MFR 6960590 is a 1/4 inch inline check valve designed to allow one-directional flow and prevent backflow in fluid and gas piping systems. The body and piston are machined from brass, providing solid corrosion resistance in plumbing and HVAC applications. The Viton seal delivers reliable seating performance across a wide temperature range, making it suitable for use with a variety of media including water, refrigerants, and light hydrocarbons. This valve connects via female NPT on the inlet and male NPT on the outlet, allowing direct threaded installation into standard pipe runs. Licensed plumbers and HVAC technicians are the primary installers.

This check valve is used in residential and light commercial plumbing, HVAC, and refrigeration piping where backflow prevention is required on small-diameter lines. The 1/4 inch pipe size makes it a common fit for refrigerant circuits, compressed air lines, chemical feed systems, and low-pressure fluid distribution. Its compact inline design allows installation in tight spaces without additional fittings or adapters between connection points.

Key Features

• Inline check valve design prevents backflow in fluid and gas systems
• Brass body and brass piston for durability and corrosion resistance
• Viton seal provides reliable seating across a broad temperature range
• 1/4 inch FNPT x MNPT connections for direct threaded installation
• Compact form factor suits tight-space installations

Compatibility

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

Installation Notes

Installation should be performed by a licensed plumber or HVAC technician in accordance with applicable local codes and the IPC or IFGC as relevant. Shut off and depressurize the system fully before removing or installing the valve. Apply thread sealant tape or pipe dope to the male NPT threads and tighten to hand-tight plus a wrench-snug fit - do not overtighten brass fittings. Verify flow direction arrow or inlet/outlet orientation before completing installation and pressurizing the system.