1/2 inch x 1/8 inch Black Iron Reducing Coupling Female x Female

1/2” x 1/8” Black Iron Reducing Coupling – Threaded Fitting for Pipe Size Transition

The 1/2” x 1/8” Black Iron Reducing Coupling is a threaded pipe fitting used to join two different-sized male-threaded pipe sections in gas, air, or water distribution systems. Constructed from black malleable iron, this coupling is engineered to handle moderate to high-pressure applications in non-potable fluid systems.

Designed with internal NPT (National Pipe Tapered) threads, the coupling offers a secure mechanical seal when used with thread sealants in accordance with standard installation practices. Its robust material composition and dimensional consistency support dependable performance in both new construction and retrofit work.

Product Features

• ✅ Malleable Iron Body — Provides strength, impact resistance, and dimensional stability under pressure.
• ✅ Threaded Connections — Female NPT x Female NPT design facilitates transition between 1/2” and 1/8” nominal pipe sizes.
• ✅ Corrosion-Resistant Coating — Black oxide finish protects against rust in dry piping environments.
• ✅ Compact Design — Space-saving dimensions make it suitable for confined piping layouts or equipment connections.

Technical Specifications

• Nominal Size: 1/2” x 1/8”
• Type: Reducing Coupling, Female x Female
• Material: Black Malleable Iron
• Thread Standard: NPT, per ASME B1.20.1
• Pressure Rating: 150 PSI maximum for steam; 300 PSI maximum for non-shock water, oil, or gas (WOG)
• Standards: Conforms to ASTM A197 and ANSI/ASME B16.3

Typical Applications

Used in commercial and industrial systems to reduce pipe size for branch lines, instrumentation take-offs, and connections to smaller components such as pressure gauges, regulators, or valves. Common in gas distribution, compressed air systems, and mechanical equipment hookups.

Material Insight

Black malleable iron fittings are suitable for applications that do not require corrosion protection from moisture exposure. They are often preferred in indoor or controlled environments where system integrity and high-pressure resistance are essential.

The 1/2” x 1/8” Black Iron Reducing Coupling provides a secure, code-compliant transition between pipe sizes in threaded piping networks. Its durable construction and precise threads make it a reliable choice for gas, air, and fluid systems requiring reduced branch connections.