When selecting a 7/8″ copper refrigerant line, choose products designed for HVAC and refrigeration use, with seamless construction, good thermal conductivity, and corrosion resistance. This guide highlights five options that suit DIY projects, home HVAC installations, and professional setups. Each product is assessed for suitability, with clear recommendations on who benefits most and potential limitations to note.
| Product | Length | OD x ID | Material | Best For |
|---|---|---|---|---|
| BELLA BAYS Copper Tubing 7/8″ OD x 0.796″ ID (25 ft) | 25 ft | 7/8″ OD x 0.796″ ID | UNS C12200 Copper | DIY installations and repairs requiring a longer flexible coil |
| Online Supply 50 ft Copper Line Set (3/8″ x 7/8″ OD) | 50 ft | 3/8″ Liquid x 7/8″ Suction | Copper | Split systems with longer runs |
| BELLA BAYS Copper Tubing 7/8″ OD x 0.796″ ID (50 ft) | 50 ft | 7/8″ OD x 0.796″ ID | UNS C12200 Copper | Extended HVAC projects and replacements |
| MUELLER 61430500 Refrigerant Line Set (50 ft) | 50 ft | 3/8″ LL, 7/8″ SL | Copper | Quick installation for split systems |
| Della 25 Ft Central Air Line Set (3/8″ & 7/8″ OD) | 25 ft | 3/8″ & 7/8″ OD | Copper/Aluminum with insulation | Central AC and heat pump lines with insulation |
BELLA BAYS 7/8 Inch Copper Tubing — 25 ft
Reference: Annealed UNS C12200 copper, 7/8″ OD, 0.796″ ID, 0.039″ wall, 25 ft coil. This seamless, coil-form tubing adheres to ASTM-B280 and offers strong thermal conductivity, corrosion resistance, and flexibility for easier bending and fitting. Best for DIY projects and smaller coils used in refrigerators or air conditioners. Limitation: shorter length may require splicing for longer runs.
Online Supply 50 Ft Insulated Copper Line Set — 3/8″ x 7/8″ OD
Reference: 100% pure copper tubing in a 50-foot line set. Includes two tubes: 3/8″ Liquid Line and 7/8″ Suction Line, suitable for HVAC split systems with standard sweat or braze connections. Best for longer runs and outdoor installations. Better for longer distances but may require cutting and fitting to match system valve sizes. Caution: Insulation is part of the package; ensure compatibility with indoor/outdoor routing to maintain condensation control.
BELLA BAYS 7/8″ Copper Tubing — 50 ft
Reference: 50 ft coil of 7/8″ OD x 0.796″ ID copper tubing with ASTM-B280 compliance and nitrogen-charged treatment for oxidation resistance. Best for longer-term installations and professional-like results in HVAC and refrigeration projects. Limitation: Slightly heavier to handle compared to shorter coils; plan for storage and handling.
MUELLER 61430500 Standard Refrigerant Line Set — 50 Feet
Reference: 50-foot refrigerant line set designed for quick installation in split-system A/C setups, with 3/8″ insulation and 7/8″ suction line. Best for contractors and installers who need a complete, ready-to-install length. Caution: Ensure compatibility with your system’s valve sizes and refrigerant type (R410A, R22, etc.).
Della 25 Ft Central Air Line Set — 3/8″ & 7/8″ OD
Reference: 25 ft line set designed for central air conditioners and heat pumps, featuring 3/8″ thick-walled copper/aluminum lines with insulation. Best for central HVAC installations where both line sizes are required and insulation helps minimize heat gain. Limitation: Contains aluminum component; consider corrosion and compatibility with refrigerants used in your system.
Buying Guide
What to consider when choosing a 7/8 copper refrigerant line
- Length requirements: Measure ran distance and add extra length for fittings, turns, and future maintenance.
- Line set composition: Decide between copper-only sets and copper-aluminum insulated lines based on system design and climate exposure.
- Connections and fittings: Check if the kit includes compatible elbows, couplings, and whether braze or sweat connections are required.
- Insulation: Insulated lines reduce condensation and energy losses, especially for outdoor runs.
- Thermal performance: Copper’s thermal conductivity improves refrigerant flow; higher purity copper generally performs well under pressure.
- Durability and corrosion resistance: Nitrogen-charged treatments and ASTM-B280 compliance indicate better longevity in challenging environments.
- Compatibility: Confirm refrigerant compatibility (R410A, R22, R32, R454B, etc.) and system type (split, central, or DIY refrigeration projects).
FAQ
- Q: What does 7/8″ OD mean on refrigerant line sets? A: It refers to the outer diameter of the copper tube, a standard size for certain refrigerant line sets.
- Q: Is copper-lined insulation important for outdoor runs? A: Yes, insulation helps reduce heat gain and condensation, improving efficiency.
- Q: Can these lines be cut to shorter lengths? A: Yes, many line sets can be cut and brazed or sweated to fit shorter runs, but follow manufacturer guidance.
- Q: Are all 7/8″ lines suitable for R410A cooling systems? A: Not always—verify refrigerant compatibility and system specs before installation.
- Q: What are common installation cautions? A: Avoid kinking the tubing, ensure clean connections, and protect lines from moisture and debris during brazing or soldering.
- Q: Do all products include insulation? A: Some do, some are copper-only; check product descriptions to confirm insulation if needed.
