AC Pair Coil & Insulated Copper Pipe | R32 R410A | Star Sparky

Q: What size pair coil do I need for my air conditioner?

The right pair coil size depends on your air conditioner model and capacity. Common pairings are 1/4" and 3/8" for smaller systems and 1/4" and 1/2" or 3/8" and 5/8" for larger units. Always match the coil to the connection sizes listed by your unit manufacturer. Our sizing guide can help you confirm.

Air Conditioning Pair Coil Copper

Air conditioner pair coil is the insulated copper pipework that carries refrigerant between your indoor and outdoor units. Sold as a matched pair of pre insulated copper tubes, pair coil helps connect the indoor and outdoor unit, cuts fitting time because both lines run together, and is easier to maneuver in tight spaces than separate pipes.

Star Sparky stocks a full range of sizes and lengths for air conditioning and refrigeration applications, with quality copper pair coils suited to modern high-pressure refrigerants including R32 and R410A, for installers and DIY buyers across Australia.

Our range covers the common pairings, including 1/4" and 3/8", 1/4" and 1/2", 1/4" and 5/8", and 3/8" and 5/8", in 3 metre, 5 metre and 20 metre lengths. Each tube is wrapped in closed cell insulation that prevents condensation and heat loss along the run, and the copper pair coil conforms to AS/NZS1571 standards. We also stock fire rated pair coils for installs that require it.

Choosing the right pair coil size matters. The correct diameter depends on your air conditioner model and the capacity of the system, and using the wrong size can affect performance and make the installation harder. Match the pair coil to the connection sizes specified by your unit manufacturer.

If you are unsure which size suits your system, use our pair coil sizing guide to match the coil to your model, or call us on 1300 996 996 or email us support@starsparky.com.au for advice. The FAQs below answer the most common pair coil questions.

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Frequently Asked Questions

The right pair coil size depends on your air conditioner model and capacity. Common pairings are 1/4" and 3/8" for smaller systems and 1/4" and 1/2" or 3/8" and 5/8" for larger units. Always match the coil to the connection sizes listed by your unit manufacturer. Our sizing guide can help you confirm.

Pair coil is a matched pair of pre insulated annealed copper tubes that carry refrigerant between the indoor and outdoor units of a split system. Pre-insulated pair coils are also a practical replacement for old insulated piping.

Modern pair coils are designed to handle high pressures of eco-friendly refrigerants. The insulation prevents condensation and heat loss. Pair coils are designed for both liquid and suction lines in air conditioners.

Pair coils typically feature seamless insulation to prevent moisture entry. They also use UV-rated insulation for runs exposed to sunlight in external applications. Pair coils are recommended for modern residential split-system installations.

Yes. Star Sparky pair coil uses copper coils designed for the higher pressures used by R32 and R410A refrigerant systems, which covers the vast majority of modern split system air conditioners sold in Australia.

Choose the length based on the distance between your indoor and outdoor units, plus a little extra for bends and connections.

We offer 3m, 5m or 20m lengths, so check the product specifications before ordering to confirm the right option. Measure the pipe path before ordering and round up rather than down.

Fire rated pair coil uses insulation that meets fire performance requirements for certain installations, such as some commercial or multi storey buildings.

Check whether your install location or building code requires it. For most standard residential installs, standard insulated pair coil is sufficient.