Conex Banninger COU-118X78 Reducing Coupling 1-1/8x7/8 in

Product Description

The CONEX BANNINGER COU-118X78 is a reducing coupling designed to connect two copper tubes of different outside diameters in a single inline joint. Specifically sized at 1-1/8 inches by 7/8 inches, this fitting transitions a larger tube down to a smaller tube without additional adapters. It is used in refrigeration, HVAC, and plumbing piping systems where a diameter change is required along a run. Licensed HVAC technicians and plumbers install this fitting using standard sweat-soldering or brazing techniques depending on the application and local code requirements.

This reducing coupling is suited for residential and light commercial refrigerant line sets, copper water supply systems, and hydronic piping where a step-down in tube size is needed. The 1-1/8 inches to 7/8 inches size transition is common in split-system refrigerant circuits and chilled water distribution where suction or liquid line diameters change between components. The catalog number COU-118X78 corresponds to Conex Banninger part MPA52400090701.

Key Features

• Reduces from 1-1/8 inches to 7/8 inches in a single inline fitting
• Compatible with standard sweat-solder and braze joining methods
• Eliminates the need for a union plus bushing combination in a size-change application
• Sized for copper tube used in HVAC refrigerant and plumbing systems

Compatibility

Designed as an OEM-style replacement or new-installation reducing coupling for copper tube systems requiring an inline 1-1/8 inches to 7/8 inches transition.

Installation Notes

Installation is performed by licensed HVAC technicians or plumbers. Recover any refrigerant and isolate the system, or shut off water supply and depressurize the line, before cutting into existing piping. Clean and deburr both tube ends and the fitting sockets before applying flux and making the sweat or braze joint. Follow all applicable local mechanical codes and ASHRAE or IFGC guidelines for joining dissimilar-diameter copper tube.

Technical Specifications

• Inlet Size: 1-1/8 inches
• Outlet Size: 7/8 inches
• Fitting Type: Reducing Coupling
• UPC: 656565801820

Standard Information

• Brand: CONEX BANNINGER
• Manufacturer Part Number: COU-118X78