Specialty Mfr 3424390 Manual Ball Valve 1/8 Inch Fnpt

Product Description

The SPECIALTY MFR 3424390 is a standard manual ball valve designed for inline shutoff and flow control in fluid and gas piping systems. Built with a brass body and a polytetrafluoroethylene (PTFE) seat, it delivers reliable sealing performance across a wide range of service conditions. The Viton elastomer seal adds resistance to fuels, oils, and many chemical media. Connection size is 1/8 inch female national pipe thread (FNPT) on both ends. A wedge-style handle provides positive quarter-turn operation. This valve is commonly installed by licensed plumbers, HVAC technicians, and gas fitters working on low-pressure service lines, equipment connections, and instrumentation piping.

This valve is suited for residential and light commercial applications where a compact, reliable shutoff is needed at a 1/8 inch pipe connection point. Typical uses include isolation valves on gas appliance lines, refrigerant or oil service ports, pneumatic control lines, and similar small-bore piping installations. The FNPT x FNPT end configuration threads directly onto standard male NPT fittings without adapters.

Key Features

• Brass body construction for corrosion resistance and durability in plumbing and HVAC service
• PTFE seat material provides low-friction, chemical-resistant sealing
• Viton seal compound rated for compatibility with fuels, oils, and many aggressive media
• FNPT x FNPT end connections fit standard male NPT threaded pipe and fittings
• Wedge-style handle allows quick quarter-turn open and close operation
• Compact 1/8 inch pipe size suits instrumentation, appliance, and small-bore service lines

Compatibility

Designed as a standard OEM-style replacement or new-installation ball valve for 1/8 inch NPT threaded piping systems in plumbing, HVAC, and gas service applications.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or HVAC technician in accordance with applicable local codes, the International Fuel Gas Code (IFGC), or the International Plumbing Code (IPC) as required by application. Shut off upstream supply pressure and depressurize the line completely before removing or installing any valve. Apply thread sealant or PTFE tape to male NPT threads per standard practice before making up connections. Verify that the valve handle is in the closed position before restoring system pressure.