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

1-1/4 inch x 1 inch Lead-Free Brass Reducing Coupling – Compliant Transition Fitting for Potable Water Systems

The 1-1/4 inch x 1 inch lead-free reducing coupling is a threaded brass fitting used to transition between different nominal pipe sizes in potable water and mechanical systems. Constructed from certified low-lead brass, this fitting is designed for systems where compliance with the Safe Drinking Water Act (SDWA) and related regulations is required.

Featuring female National Pipe Thread (NPT) ends, the coupling supports direct connection between male-threaded components in copper, CPVC, or steel piping systems. Precision-machined threads ensure reliable engagement and pressure sealing when used with appropriate thread sealant.

Product Specifications

• Material: Lead-free brass (≤0.25% weighted lead content)
• Nominal Sizes: 1-1/4 inch x 1 inch
• Connection Type: Female NPT x Female NPT
• Compliance: NSF/ANSI 61 and 372 certified for potable water systems

Performance Characteristics

• ✅ Lead-Free Certified Suitable for drinking water applications as mandated by federal and state law
• ✅ Dimensional Consistency Manufactured to ANSI B1.20.1 standards for NPT fittings
• ✅ Thread Integrity Machined for smooth engagement, minimizing risk of cross-threading or seal failure
• ✅ Corrosion Resistance Brass composition offers long service life in potable and non-potable water systems
• ✅ Pressure Rating: Rated for typical residential and commercial system pressures (verify per system design)

Installation Considerations

Apply an approved PTFE thread sealant or pipe compound prior to assembly. Use two properly sized wrenches—one to stabilize the body of the fitting and one to tighten the adjoining pipe—to avoid deformation. Over-tightening should be avoided to preserve thread integrity and sealing surfaces.

Typical Applications

The 1-1/4 inch x 1 inch brass reducing coupling is commonly used in:

• Potable water supply systems (cold and hot)
• Mechanical piping networks requiring size transitions
• Manifold connections and water heater tie-ins
• Hydronic heating systems using threaded brass components

Regulatory Note

All fittings used in potable water systems must comply with NSF/ANSI 61 (Health Effects) and NSF/ANSI 372 (Lead Content). This coupling meets both standards and is suitable for use in public and private water distribution systems.

The 1-1/4 inch x 1 inch lead-free reducing coupling provides a reliable and compliant solution for transitioning between pipe sizes in water supply systems. Its brass construction ensures mechanical strength and chemical resistance across a variety of installation environments.