Mueller Industries W 01245 Copper Pipe Adapter 3/4x1 in

Product Description

The MUELLER INDUSTRIES W 01245 is a wrot copper pipe adapter designed to transition between a 3/4-inch copper sweat connection and a 1-inch female threaded connection. It uses a C x F (copper-to-female) solder joint configuration, making it a standard fitting for copper piping systems in residential and commercial plumbing, HVAC hydronic loops, and mechanical piping applications. Wrot copper construction provides consistent wall thickness and excellent machinability, which results in clean, reliable solder joints. The adapter weighs 0.218 pounds and features outside diameters of 7/8 inch on the copper end and 1 inch on the female threaded end. Licensed plumbers and pipefitters are the primary installers of this fitting.

This adapter is suited for applications where a copper sweat line must connect to a female NPT port — common at valve bodies, pump inlets, water heater connections, manifold ports, and fixture supply transitions. It is appropriate for both hot and cold water supply lines, hydronic heating and cooling piping, and other pressure piping systems where copper is the specified material. Its compact form factor fits tight chase and cabinet installations without special tooling beyond a standard solder kit.

Key Features

• Wrot copper construction for uniform wall thickness and clean soldering surfaces
• C x F end connection — 3/4-inch copper sweat inlet, 1-inch female threaded outlet
• Outside diameters: 7/8 inch (copper end) and 1 inch (threaded end)
• Meets ASME B16.22, ASME B16.18, ASME B16.15, ASME B16.50, and NSF 61G standards
• Complies with ASME B1.20.1 thread form requirements
• Single-piece unit — no assembly required prior to installation

Compatibility

Designed as an OEM-style replacement or new-installation fitting for copper pressure piping systems requiring a 3/4-inch copper sweat to 1-inch female threaded transition.

Installation Notes

Installation is performed by a licensed plumber or pipefitter in accordance with applicable plumbing codes, including IPC and IFGC requirements for copper pressure piping. Shut off and drain the water supply and relieve system pressure completely before cutting or fitting any pipe. Clean and flux both the copper tube end and the fitting socket before applying heat; avoid overheating, which can burn flux and produce a weak joint. Thread sealant or PTFE tape should be applied to the male threaded pipe being joined to the female end of this adapter.