Mueller Industries W 01145 Copper Pipe Adapter 3/4x1 in

Product Description

The MUELLER INDUSTRIES W 01145 is a wrot copper pipe adapter designed to transition between a 3/4-inch copper sweat connection and a 1-inch male threaded (MPT) connection. The fitting uses a solder joint on the copper end and a standard male NPT thread on the outlet, making it a reliable choice for permanent copper piping systems where a threaded connection point is required. At 0.198 pounds, this compact adapter is manufactured from wrot copper, which offers superior grain structure and pressure integrity compared to cast fittings. Licensed plumbers and mechanical contractors use this adapter in potable water, hydronic heating, and light commercial piping applications.

This adapter is suited for residential and light commercial plumbing systems where a transition from a sweat copper line to a threaded male fitting is needed. Typical applications include connecting copper supply lines to threaded valves, boiler components, water heaters, manifolds, and similar threaded fixtures. The C x M configuration means the copper-side socket is soldered to the pipe, and the male threaded end connects into a female-threaded port. It is used in both new construction and retrofit work wherever a 3/4-inch copper line must terminate at a 1-inch male thread.

Key Features

• Wrot copper construction provides a dense grain structure suited for pressure-bearing solder joints
• 3/4-inch C (solder cup) inlet to 1-inch M (male NPT) outlet configuration
• Outside diameter measures 7/8 inch on the copper end and 1 inch on the threaded end
• Meets ASME B16.22, ASME B16.18, ASME B16.15, and NSF 61G standards for potable water use
• Solder joint end compatible with standard lead-free soldering procedures
• Lightweight at 0.198 pounds, easy to handle in confined spaces

Compatibility

Designed as an OEM-style replacement and standard-fit adapter for copper piping systems requiring a 3/4-inch sweat-to-1-inch male NPT transition in residential and light commercial plumbing installations.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off and drain the water supply completely before soldering or threading any connections. Clean and flux the copper pipe end thoroughly before applying heat, and use only lead-free solder where required by code for potable water systems. Apply thread sealant or PTFE tape to the male threads before engaging the female fitting to ensure a leak-free connection.