Mueller Industries W 01009 Copper Coupling 1/4 Inch

Product Description

The MUELLER INDUSTRIES W 01009 is a 1/4-inch wrot copper pipe coupling with a rolled stop, designed for sweat-solder (C x C) connections in copper piping systems. The rolled stop centers the pipe inside the fitting, ensuring consistent solder joint depth and reliable flow. This fitting is manufactured from wrot copper, which offers superior strength and leak resistance compared to cast fittings. It meets multiple ASME dimensional and pressure standards, making it suitable for potable water, hydronic heating, refrigeration lines, and similar copper tubing applications. Licensed plumbers and HVAC technicians install this fitting using standard soldering tools and flux.

This coupling is used in residential and light commercial plumbing and HVAC systems wherever a straight copper-to-copper connection is required in 1/4-inch tubing. Common applications include refrigeration line repairs, small-diameter potable water distribution, and hydronic system piping. The C x C end configuration accepts standard copper tubing on both ends for a full sweat-solder joint. It is sold individually but must be ordered in multiples of 5.

Key Features

• Rolled stop positions pipe at correct insertion depth for a consistent solder joint
• Wrot copper construction provides greater strength and pressure resistance than cast alternatives
• C x C solder joint ends compatible with standard copper tubing
• Meets ASME B16.22 and related dimensional standards for pressure fittings
• Lightweight at 0.0073 pounds per piece — suitable for tight spaces and overhead runs

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/4-inch copper tubing systems using sweat-solder (C x C) connections in plumbing and HVAC applications.

Installation Notes

Installation requires a licensed plumber or qualified HVAC technician in most jurisdictions. Before soldering, shut off and depressurize the water or refrigerant line and allow all moisture to evacuate the pipe. Clean pipe ends and fitting sockets with emery cloth and apply an approved flux before heating with a torch. Follow applicable IPC and local plumbing code requirements for solder alloy selection, especially on potable water systems.