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Browse ProductsCopper Refrigerant Lines
Find reliable refrigerant lines for your HVAC system at National Air Warehouse. Ensure efficient cooling. Shop now for quality and performance!
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Need help choosing the right system or part? Curious about how shipping works? Call or live chat to speak with one of our knowledgeable professionals, Mon – Fri 8AM to 5PM ET.
In Stock 
In Stock 1/4" LL x 3/8" SL Mini Split Refrigerant Line Set w/ Flare Nuts 1/2" Insulation (15') B143812015F B143812015F
$122.68
Shipping included
In Stock 
In Stock 
In Stock 
In Stock 1/4″ LL x 3/8″ SL Mini Split Refrigerant Line Set w/ Flare Nuts 1/2″ Insulation (25′) B143812025F B143812025F
$142.97
Shipping included
In Stock In Stock 
In Stock In Stock In Stock In Stock 
In Stock ICOOL 1/4" X 1/2" X 1/2" X 15' White PE Insulation Both Joined Line Set, Flared Nuts, Type B B141212015F
$165.67
Shipping included
In Stock ICOOL 1/4" X 1/2" X 1/2" X 25' White PE Insulation Both Joined Line Set, Flared Nuts, Type B B141212025F
$195.30
Shipping included
In Stock K Flex 1 1/8" Copper Refrigerant Tubing Insulation (6 Foot Length) Box of 8 6RX048118
$93.12
Shipping included
In Stock K Flex 3/4" Copper Refrigerant Tubing Insulation (6 Foot Length) Box of 8 6RX048068
$86.66
Shipping included
In Stock K Flex 7/8" Copper Refrigerant Tubing Insulation (6 Foot Length) Box of 8 6RX048078
$89.14
Shipping included
Copper refrigerant line sets
Pre-insulated copper line sets for central systems and mini splits, in common sizes such as 1/4" x 1/2" and 1/4" x 3/8", in 15 ft and 25 ft lengths.
What to check
- Size: use the liquid and suction line sizes listed in your outdoor unit's installation manual. Long runs may need a larger suction line.
- Length: measure the actual route between the units and add slack for bends.
- Mini splits: check whether your system uses flare connections and the line sizes for its BTU rating.
Shipping and returns
Free shippingIncluded on orders to the continental US.
Fast dispatchParts ship by UPS or FedEx Ground in 1 to 2 business days.
Tampa pickupWill-call pickup at our Tampa warehouse, Monday to Friday.
30-day returnsUnused items in original packaging, within 30 days of delivery. Special-order items are final sale.
Not sure what fits?Call us with your model number, Monday to Friday, 8am to 5pm ET.