Get the right copper fittings, insulation, and essential accessories to build, repair, and protect HVAC refrigerant line sets at a budget-friendly price.
List price:
$225.00Our price:
$195.00Our accessory category focuses on refrigeration-grade ACR copper components, K-Flex closed-cell elastomeric insulation, and the brazing/solder supplies pros trust. From elbows, couplings, reducers, and tees to flare nuts and caps, plus adhesives and tapes, you’ll find what you need for clean, durable connections and properly insulated line sets. Most items land between $2 and $12, keeping projects on budget without compromising performance.
Whether you’re a DIY-capable homeowner, licensed contractor, property manager, or working light commercial, these parts support common tasks: joining copper refrigerant lines, adapting fittings for new installs, repairing or extending tubing, sweating/brazing copper connections, and insulating line sets to prevent condensation and heat gain. Use with split systems, heat pumps, and mini-splits when matched to the equipment’s specified line sizes.
These accessories do not change system SEER2, BTU output, or tonnage; they simply help your equipment maintain its rated performance. ACR copper and quality insulation support efficient operation across the refrigerants approved by your equipment manufacturer. Select insulation thickness appropriate for climate and follow best practices for clean, leak-free joints.
K-Flex insulation, Copper ACR fittings and adapters, and components sized for Gree mini-split line sets lead this collection, with LucasMilhaupt brazing alloys and TradePro accessories available for professional results.
ACR-rated long-radius elbows, couplings, reducers, street ells, tees, flare nuts, and caps are common. Match the tubing OD and choose fittings suited to brazed or flared joints.
Match the insulation ID to the tube OD, dry-fit, then seal seams and butt joints with approved contact adhesive or tape. Protect outdoor runs from UV and mechanical damage.
Yes. Use ACR copper, fittings, and insulation that match the unit’s specified line sizes. Many mini-splits use small OD suction/liquid lines-always follow the manufacturer’s chart.
A torch (air- or oxy-acetylene), silver brazing alloy, tube cutter/deburrer, emery cloth, nitrogen for purge and pressure testing, flux when required, and proper PPE.
Use 1/2 inch minimum in typical conditions; in warm or humid climates, 3/4 to 1 inch helps limit sweating and heat gain. Confirm local codes and equipment guidance.
Use refrigeration-grade ACR components for HVAC. Plumbing fittings are sized differently and are not cleaned/dehydrated for refrigerant service.
Copper-to-copper joints are commonly brazed with silver-phos alloy without flux; copper-to-brass requires flux. Soft solder is generally not used on high-pressure lines.
Wear eye/hand protection, keep a fire watch, purge with nitrogen while brazing, ventilate, follow adhesive directions, and pressure test before charging the system.
Maintain a low nitrogen flow (typically 2-5 SCFH) through the tubing during brazing to prevent internal oxidation and keep the system clean.
Only if undamaged with perfect sealing surfaces. Best practice is to make a fresh flare and use new flare nuts, then torque to the equipment specification.
