Mueller Streamline COCOUP4 4 in Copper Coupling C X C

Product Description

The MUELLER STREAMLINE COCOUP4 is a 4-inch copper coupling with a dimpled tube stop, designed for joining copper tubing in a cup-by-cup (C x C) sweat-solder configuration. The dimpled tube stop positions pipe ends at the correct insertion depth before soldering, helping ensure a consistent, leak-free joint. This fitting is intended for use in pressure piping systems and is installed by licensed plumbers and pipefitters working on residential and commercial water distribution, hydronic heating, or mechanical piping systems.

This coupling is suited for straight-run connections in 4-inch copper piping systems. The C x C end connections accept standard copper tubing on both ends, making it a common choice for repairs, extensions, or new rough-in work. At 4 inches, this fitting is typically found in commercial or industrial water service, large-diameter hydronic systems, and main distribution lines rather than typical residential branch lines.

Key Features

• Dimpled tube stop ensures consistent pipe insertion depth for repeatable solder joints
• Cup-by-cup (C x C) ends accept standard copper tubing on both sides
• 4-inch diameter suits large commercial and industrial piping applications
• Copper construction provides corrosion resistance in water service applications
• Sweat-solder connection compatible with standard plumbing torch and flux technique

Compatibility

Designed as an OEM-style pressure fitting for use with standard 4-inch copper tubing in sweat-solder plumbing and mechanical piping systems.

Installation Notes

Installation is performed by a licensed plumber or pipefitter using standard torch, flux, and lead-free solder per local plumbing codes and ASTM B32 solder requirements. Shut off and drain the water supply completely before cutting into any existing line. Clean all mating surfaces with emery cloth and apply flux evenly before heating. Follow all applicable IPC and local code requirements for pressure testing after soldering.

Technical Specifications

• Connection Type: C x C (Cup by Cup, Sweat Solder)
• Pipe Size: 4 inches
• Material: Copper
• Tube Stop Style: Dimpled

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: COCOUP4