Specialty Mfr 6961190 Check Valve 1/4 Inch Mnpt Brass

Product Description

The SPECIALTY MFR 6961190 is a 1/4-inch inline check valve designed to allow one-directional fluid or gas flow while preventing backflow in piping systems. The body and piston are both constructed from brass, making this valve well-suited for use in plumbing, HVAC, and light industrial applications where corrosion resistance and durability are required. The seal material is Viton, which offers compatibility with a range of fluids including water, oils, and many refrigerants. Both end connections are male NPT (MNPT x MNPT), allowing direct threaded installation into standard pipe fittings. Licensed plumbers and HVAC technicians are the typical installers of this type of valve.

This check valve is used in residential and commercial systems where backflow prevention is necessary in a 1/4-inch pipe line. Typical applications include refrigeration lines, compressed air systems, water supply lines, and hydronic heating circuits. The compact inline design keeps the installation footprint small, making it a practical fit in tight mechanical spaces. The MNPT x MNPT connection type allows threading directly into female-threaded ports or fittings without adapters in most standard configurations.

Key Features

• Inline check valve design prevents backflow in 1/4-inch piping systems
• Brass body and piston construction for durability and corrosion resistance
• Viton seal material compatible with water, oils, and many refrigerants
• MNPT x MNPT end connections for straightforward threaded installation
• Compact form factor suitable for tight mechanical installations

Compatibility

Designed as an OEM-style replacement or direct-install inline check valve for 1/4-inch MNPT threaded piping applications in plumbing, HVAC, and refrigeration systems.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with applicable local plumbing codes and the IPC. Always shut off the fluid or gas supply and relieve system pressure before removing or installing any check valve. Use appropriate thread sealant or PTFE tape on all NPT connections and verify flow direction markings on the valve body before final assembly. Do not over-tighten threaded connections on brass fittings, as this can cause cracking or damage to the valve body.