Klein Tools 7/8x3/4rc Copper Coupling Reducer

Product Description

The KLEIN TOOLS 7/8x3/4rc is a copper coupling reducer designed to connect two copper lines of different outside diameters within a refrigeration or HVAC system. It transitions from a 7/8-inch OD fitting to a 3/4-inch OD fitting, allowing technicians to tie together lines or components that do not share the same diameter. Copper construction provides reliable thermal conductivity, corrosion resistance, and compatibility with standard brazing procedures. HVAC and refrigeration technicians reach for this type of fitting when field conditions require a reduction between two mismatched line sizes without adding additional adapters.

This coupling reducer is suited for residential and light commercial refrigeration and air conditioning line sets where a diameter transition is required at a joint. It is installed at junction points in refrigerant piping, equipment connections, or branch line assemblies where 7/8-inch OD and 3/4-inch OD copper tubing must be joined. The fitting is sold individually, making it practical for service calls and small repairs where only a single transition point needs to be addressed.

Key Features

• Reduces from 7/8-inch OD coupling to 3/4-inch OD coupling in a single fitting
• Copper construction supports standard brazing and soldering joining methods
• Compatible with common refrigerant-grade copper tubing used in HVAC and refrigeration systems
• Sold as individual units for targeted service and repair applications

Compatibility

Designed as an OEM-style replacement fitting for HVAC and refrigeration copper line assemblies requiring a transition between 7/8-inch OD and 3/4-inch OD connections.

Installation Notes

Installation should be performed by a licensed HVAC or refrigeration technician following applicable mechanical codes. Recover all refrigerant and relieve system pressure before cutting into any refrigerant line. Clean and deburr tubing ends before fitting, and use appropriate brazing alloy and flux per system and refrigerant type requirements. Do not apply flame directly to the fitting body longer than necessary to avoid compromising the copper.

Technical Specifications

• Inlet OD: 7/8 inches
• Outlet OD: 3/4 inches
• Material: Copper
• Connection Type: OD Coupling x OD Coupling
• Unit of Measure: Each

Standard Information

• Brand: KLEIN TOOLS
• Manufacturer Part Number: 7/8x3/4rc