16FT Air Conditioning Tubing Hose Extension 3/8 and 5/8 Inch Insulated Copper Hoses Fit for Mini Split Air Conditioner
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Free shipping to the US for a limited time
Free Returns
30 days worry-free return.
Secure Payment
One year warranty
Key Features
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High-Ductility Red Copper: Crafted from premium red copper tubing, known for its optimal toughness, hardness, and excellent ductility. This ensures a long service life and reliable structural integrity under high-pressure conditions.
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Enhanced Protection Insulation: Sheathed in extra-thick heat preservation cotton insulation. This advanced thermal barrier minimizes energy loss, prevents external condensation drippings, and actively cushions the internal copper tubes from physical damage.
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Leak-Free Precision Engineering: Features heavy-duty, thickened brass connection nuts with high structural hardness to prevent thread stripping or slipping. Each end undergoes precise mechanical reaming to eliminate burrs, guaranteeing a flush, leak-proof joint.
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Direct Ready-to-Install Design: Arrives completely finished and pre-fabricated for immediate mechanical connection. It eliminates the need for manual on-site welding or flaring, saving valuable time during deployment.
Fitment & Compatibility Guide
Pre-Purchase Notice: Please cross-reference your specific mini-split air conditioner or heat pump service manual to confirm that the system’s suction and liquid line ports require 3/8-inch and 5/8-inch sizing.
Official Kit Component Specifications
| Component Type | Total Length | Line Diameter 1 | Line Diameter 2 | Installation Method |
| Air Conditioning Tubing Extension | 16 Feet (approx. 4.9 meters) | 3/8 Inch | 5/8 Inch | Direct Mechanical Attachment |
Product Specifications
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Part Type: Insulated Refrigerant Line Set / Extension Hose
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Tubing Material: High-Grade Ductile Red Copper & Structural Brass
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Insulation Material: Thickened High-Density Thermal Cotton
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Condition: 100% Brand New
Package Includes
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1 × 16FT Insulated Red Copper Tubing Assembly (3/8" & 5/8" Connected Hoses)
Important Mechanical & Installation Notes
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Professional HVAC Certification Advised: Connecting refrigerant lines, executing proper pressure hold checks, and conducting system evacuations involve specialized equipment and adherence to regional environmental standards. Installation by a licensed HVAC professional is highly recommended.
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Manage Line Bends Carefully: While red copper offers excellent flexibility, always uncoil and bend the line set gradually. Avoid sharp kinks or crisp folds, which can constrict refrigerant flow, limit system efficiency, or strain the compressor.
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System Evacuation: Ensure all lines are thoroughly tested for leaks and properly evacuated using a vacuum pump to eliminate moisture and air before releasing the system's refrigerant.
To ensure a faster and secure delivery, we choose FedEx, USPS, UPS, DHL Ground/Air shipping service. Available shipping methods are vary from different type of products and delivery destination. The majority in stock products and orders are going to be shipped the same day or within 1 business day. After which its delivery details can be tracked with the tracking number we email you. For custom or made to order products’ shipping time varies as they may have to be manufactured, painted, embroidered or assembled.
For more information, please check the following tips:
- Oversized products must ship by truck freight or LTL which is different from other ground shipping methods. Please noted that oversized products are required inspections and a signature service. Freight Shipping Information
- We offer free shipping service for 47 sates in domestics. HI, PR, AK, Guam, Virgin Islands, APOs are excluded from free shipping areas. You will be charged extra shipping fee for orders’ destinations that are not 47 free shipping states.
- "Free Shipping" applies only to orders shipped within the continental United States.
DISCLAIMER
In order to provide all our valued customers with the most up to date and accurate compatibility information, LABWORKAUTO is continuously implementing real-time updates to our line store. Due to the immediate nature of these updates, the correction of any errors or omissions might happen at any time without prior notice. This information may include but not limited to pricing, availability, suggested use, fitment, compatibility and warranties. LABWORKAUTO is not responsible for any additional labor cost, charge, loss or damage incurred as a result of correct or incorrect information, reference or products purchase from LABWORKAUTO. While we are working to avoid any errors or omissions that may appear on LABWORKAUTO website, we reserve the rights to cancel any undeliverable orders based on inaccurate information.
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RETURN
If you are not completely satisfied with your purchase, we will be happy to accept a return for a refund or exchange on products in new/unused condition within 30 days of delivery. All authorized returns must be unused and in their original condition, including all items and components that were included in the original package. Items being returned must not have been disassembled, mounted, modified, or damaged due to incorrect installation or user error. LABWORKAUTO.com will not be held responsible for installation or labor expenses, towing expenses, additional repair expenses, or rental car expenses caused by the use of wrong or defective parts during installation.We provide a limited warranty of 90 days for defective products from the date the product is received by the original purchaser or installer, unless otherwise specified at the time of purchase.
For each of our product warranties offered above, the following provisions apply:
The warranty is limited only to the original purchaser and is non-transferable.
Under NO circumstances will our liability exceed the amount of the original sale.
Each warranty does not cover any labor costs or incidental, indirect, special or consequential damages such as, but not limited to, physical injuries or property damage, loss of time, loss of use of the vehicle, inconvenience, air freight charges, rental vehicle charges, towing charges or accommodations resulting from a defect in or failure of the part.
A prepaid shipping label will be issued for all returns due to warranty claim.
The warranty does not cover lost or stolen packages. Because the customer is the shipper, he/she is the only one who can file any lost claim with the shipping company. Therefore, the claim must be coordinated and processed through the shipping company by the customer.