1/4 inch x 1/8 inch Black Iron Reducing Coupling Female x Female

1/4" x 1/8" Black Malleable Iron Coupling – Threaded Reducing Fitting for Low-Pressure Applications

The 1/4 inch x 1/8 inch black malleable iron coupling is a reducing fitting designed for joining two male-threaded pipes of different diameters in low-pressure gas, air, or water systems. Manufactured from ASTM A197 malleable iron, this coupling offers high impact resistance and toughness suitable for indoor and covered outdoor installations.

This fitting features threaded (FIP x FIP) ends conforming to ANSI B1.20.1 specifications and is typically used in black iron piping systems where corrosion resistance is not a primary concern. Its compact design allows installation in space-constrained areas while maintaining a reliable seal when properly torqued and sealed with approved thread compound or tape.

Product Specifications

• Material: Black Malleable Iron (ASTM A197)
• Size: 1/4" x 1/8" nominal pipe size
• Connection Type: Threaded FIP x FIP (Female Iron Pipe)
• Pressure Rating: Up to 150 psi (non-shock) for steam, water, or air systems
• Compliance: Threads meet ANSI/ASME B1.20.1 standards

Installation Considerations

Threaded connections should be made using appropriate sealants to prevent leakage under operating conditions. Use of tools such as pipe wrenches is recommended to ensure proper mechanical engagement. For gas service, always perform leak testing per applicable codes before system activation.

Typical Applications

Commonly found in natural gas distribution lines, compressed air systems, and closed-loop water circuits, this reducing coupling provides reliable performance where pipe size transitions are necessary. It is also suitable for utility or mechanical rooms and maintenance applications requiring compact fittings.

Note:

This fitting is intended for non-potable use. For potable water systems, fittings should comply with NSF/ANSI 61 and be designated as lead-free.