1 inch x 3/4 inch Black Iron Reducing Coupling Female x Female

1" x 3/4" Black Malleable Iron Coupling – Precision Fit for Threaded Systems

Engineered for secure joining of threaded pipe systems, this 1" x 3/4" black malleable iron coupling delivers dependable performance across both high- and low-pressure applications. The fitting supports transitions between different pipe sizes and is commonly used in hydronic, steam, gas, and general utility piping systems.
Its cast construction and uniform threading ensure alignment, strength, and durability during system operation.

This coupling is manufactured to standard tolerances and materials specifications consistent with industry requirements for mechanical and plumbing installations. It offers a secure, leak-resistant union point between male-threaded steel or iron piping segments.

Performance Advantages

Contractors depend on consistent performance from every component in a piping system. This coupling is built to provide:

• ✅ Controlled Flow Transition Internal profile supports fluid continuity when reducing from 1" to 3/4".
• ✅ Precision Machining Threads are cut to ensure full engagement and system integrity under load.
• ✅ Service Longevity Material composition and wall thickness are designed for extended use in static or dynamic systems.

Technical Specifications

• Nominal Sizes: 1" FIP x 3/4" FIP (female iron pipe threads)
• Material: Black malleable iron
• Connection Type: Threaded, reducing coupling
• Standards: Manufactured in accordance with applicable ASTM and ANSI/ASME pipe fitting specifications

Installation Guidelines

Installation requires proper thread preparation using sealant paste or PTFE tape. Use appropriate hand or pipe wrenches to secure the fitting without over-torquing, which can compromise thread integrity. This coupling should be installed by personnel trained in threaded pipe assembly and qualified under applicable mechanical code standards.

Typical Applications

Used extensively in commercial, industrial, and residential systems involving natural gas, air, oil, and closed-loop hydronic heating. Its size configuration allows for transition between line sizes where system design dictates flow control or dimensional change.

Application Note

Black malleable iron fittings are selected in gas and fluid systems where galvanized finishes are not required or not permitted. Their strength and temperature tolerance make them suitable for mechanical systems subjected to cyclical loads and elevated service conditions.

This 1" x 3/4" black iron coupling offers a durable solution for contractors seeking precision alignment, code-compliant performance, and long service life in mission-critical piping applications.