Mueller Streamline CPL00478 Reducing Coupling 1/2x1/4 Cxc

Product Description

The MUELLER STREAMLINE CPL00478 is a wrot copper reducing coupling designed to connect two copper tubes of different diameters in a single inline joint. It steps down from a 1/2-inch connection to a 1/4-inch connection using a solder-style C x C (cup-by-cup) end configuration. At 0.03 pounds and 1.08 inches in length, this compact fitting is built for tight spaces and high-volume service work. It meets ASME and NSF standards, making it suitable for potable water systems and general plumbing applications. Licensed plumbers and HVAC technicians install this fitting during new construction, remodel work, and equipment service calls where copper line size transitions are required.

This reducing coupling is used in residential and light commercial plumbing and refrigeration systems wherever a copper tube run must transition from 1/2-inch to 1/4-inch tubing. Common applications include supply line reductions, equipment connections, and branch line transitions in copper hydronic and domestic water systems. Its wrot construction provides consistent wall thickness and reliable joint integrity when properly soldered or brazed.

Key Features

• Reduces from 1/2-inch to 1/4-inch in a single fitting, eliminating the need for multiple adapters
• Wrot copper construction delivers uniform wall thickness and strong, leak-resistant soldered joints
• C x C end connections accept standard copper tube for sweat soldering or brazing
• Meets ASME and NSF standards, approved for use in potable water systems
• Compact profile at 1.08 inches in length suits confined installation spaces

Compatibility

Designed as an OEM-style replacement and standard-service fitting for copper tube systems requiring an inline 1/2-inch to 1/4-inch C x C reducing connection.

Installation Notes

Installation is performed by a licensed plumber or HVAC technician using standard sweat-soldering or brazing procedures. Shut off and depressurize the water or refrigerant line and allow all components to cool completely before cutting and fitting the coupling. Clean and flux both tube ends per ASTM and local code requirements before applying heat. Follow applicable IPC and IFGC code sections for joint preparation, material compatibility, and inspection requirements.

Technical Specifications

• Material: Wrot Copper
• Connection Size: 1/2 x 1/4 inches
• Connection Type: C x C (Cup x Cup)
• Actual Length/Depth: 1.08 inches
• Actual Height: 0.71 inches
• Actual Width: 0.71 inches
• Actual Weight: 0.03 pounds
• Standards / Compliance: ASME, NSF

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: CPL00478