1 inch x 3/4 inch Brass Reducing Coupling Female x Female

1” x 3/4” Brass Reducing Coupling – Female Threaded Fitting for Diameter Transition

The 1” x 3/4” brass reducing coupling is designed to connect two sections of pipe with differing nominal diameters in threaded systems. Featuring female NPT (National Pipe Thread) ends, this fitting facilitates secure, corrosion-resistant transitions in potable water, hydronic heating, and other mechanical piping applications.

Manufactured from lead-free brass, the coupling complies with national low-lead regulations for potable water use. Its solid brass body ensures durability, pressure retention, and dimensional stability, even in systems subject to temperature fluctuations or mechanical vibration.

Product Specifications

• ✅ Material: Lead-free brass (typically C46500 or equivalent)
• ✅ Connection Type: Female NPT x Female NPT
• ✅ Nominal Sizes: 1” x 3/4”
• ✅ Operating Temperature: Up to 180°F (non-continuous), based on application and pipe type
• ✅ Compliance: Certified to NSF/ANSI 61 and 372 for use in potable water systems

Functional Attributes

• ✅ Threaded Transition – Enables downsizing of system diameter while maintaining flow direction and pipe integrity
• ✅ Corrosion Resistance – Brass composition is inherently resistant to dezincification, scaling, and internal corrosion in most potable and non-potable fluids
• ✅ Machined Threads – Precision-cut for secure sealing with compatible brass, copper, or iron piping

Installation Guidance

Apply PTFE thread sealant or approved pipe joint compound to male pipe threads before installation. Use a properly sized wrench to tighten—avoid overtightening to prevent thread deformation. Coupling is suitable for use in rigid piping layouts or connections to valves, manifolds, and backflow devices.

Application Use Cases

This reducing coupling is commonly used in domestic water distribution systems, mechanical equipment tie-ins, hydronic heating loops, and system retrofits requiring a change in pipe diameter. It is suitable for vertical and horizontal orientations and for use in concealed or exposed piping runs.

Material Note

Lead-free brass fittings meet current U.S. federal and state regulations for safe use in drinking water systems. Their mechanical strength and thermal stability make them ideal for long-term performance in both residential and commercial installations.

The 1” x 3/4” brass reducing coupling supports system versatility and long-term service life in threaded piping networks that require dimensional transitions without compromising sealing integrity or code compliance.