Specialty Mfr 6960690 Inline Check Valve 1/4 in Brass

Product Description

The SPECIALTY MFR 6960690 is a 1/4-inch inline check valve designed to allow one-directional flow and prevent backflow in pressurized fluid systems. The body and piston are both constructed from brass, offering solid corrosion resistance in a compact form factor. End connections are MNPT x FNPT, allowing threaded installation into existing pipe runs without additional adapters. The valve carries a 3,000 WOG (Water, Oil, Gas) pressure rating, making it suitable for demanding service conditions. Nitrile butadiene rubber (NBR) seals provide reliable shutoff across a range of compatible fluids. Licensed plumbers and HVAC technicians are the typical installers for this type of fitting.

This check valve is used in residential and light commercial plumbing, HVAC refrigerant lines, compressed air systems, and hydraulic circuits where backflow prevention at small pipe sizes is required. The 1/4-inch pipe size suits control lines, instrument connections, and branch circuits rather than main supply runs. The inline configuration fits directly in-line with existing threaded pipe, making it a straightforward drop-in component for new installations or service replacements.

Key Features

• 3,000 WOG pressure rating for water, oil, and gas service
• Brass body and piston for corrosion-resistant, long-service construction
• MNPT x FNPT end connections for direct threaded installation
• Nitrile butadiene rubber (NBR) seals compatible with a broad range of fluid media
• Inline valve configuration prevents backflow without modifying existing pipe layout
• 1/4-inch pipe size suits control circuits, instrument lines, and small branch connections

Compatibility

Designed as an OEM-style replacement or new-installation inline check valve for 1/4-inch threaded pipe systems in plumbing, HVAC, compressed air, and fluid control applications.

Installation Notes

Installation is performed by a licensed plumber or qualified HVAC technician. Shut off supply pressure and depressurize the line fully before removing or installing any check valve. Apply thread sealant or PTFE tape to male threads in accordance with applicable IPC and IFGC guidelines. Confirm flow-direction arrow on the valve body is oriented correctly before tightening connections.