Description
The HVAC365 3/8-inch x 5/8-inch copper line set is a 50-foot refrigerant piping assembly designed for compatible ductless mini-split installations. It provides the paired copper tubes used to connect an indoor air handler with its matching outdoor condenser. This extended-length option is intended for HVAC contractors, installers, and property owners whose equipment specifically requires 3/8-inch and 5/8-inch refrigerant connections.
The 50-foot length supports installation layouts where the indoor and outdoor units are separated by a considerable distance. It may be useful when refrigerant piping must travel around building features, between floors, through an attic or service area, or to an outdoor condenser installed away from the conditioned space. The complete route should be measured before purchasing, including vertical sections, bends, wall penetrations, connection points, and any manufacturer-required service allowances.
This line set is supplied in a pre-flared configuration, which can reduce tube-end preparation when the provided flares match the equipment connections. Included insulation helps protect the refrigerant tubing and limit unwanted heat transfer. The copper, insulation, and flare connections must still be inspected and installed according to the HVAC equipment manufacturer’s instructions.
Key Features
- 3/8-inch and 5/8-inch tubing sizes: Includes the two listed copper tube diameters for compatible ductless HVAC equipment
- 50-foot line-set length: Provides extended routing flexibility for installations with greater separation between system components
- Pre-flared configuration: Helps reduce on-site tube preparation when the existing flares are suitable for the equipment
- Insulated copper tubing: Supplied with insulation to support refrigerant piping installation
- Ductless mini-split application: Designed to connect compatible indoor and outdoor mini-split components
- HVAC365 SKU 3858-50-HVAC365: Identifies this specific tubing-size and length combination
The coiled line set has a listed product weight of approximately 20 pounds. It should be transported, uncoiled, and routed carefully to avoid damaged flare ends, torn insulation, flattened tubing, or kinks. Bends must remain within acceptable limits for the tubing and connected equipment.
The product’s length, tube sizes, pre-flared construction, insulation, SKU, and listed weight are confirmed on the HVAC365 product page.
Compatibility and Installation Notes
This line set is not universally compatible with every ductless mini-split system. Buyers must confirm that both the indoor and outdoor units require 3/8-inch and 5/8-inch refrigerant connections. Similar capacities or products from the same manufacturer may use different piping sizes.
The equipment’s permitted piping length must also be verified. A 50-foot route must remain within the system’s maximum total line length and vertical-separation limits. Some systems also specify a minimum piping length.
Because 50 feet may exceed the factory refrigerant allowance of some condensers, the installation manual must be checked for additional-charge requirements. Any additional refrigerant must be measured and added according to the manufacturer’s specified amount per foot. The listing does not indicate that this line set is precharged with refrigerant.
Pre-flared tubing still requires professional inspection and installation. Each flare should be checked for cracks, contamination, deformation, and proper alignment. Flare nuts must be tightened to the equipment manufacturer’s specified torque. The finished system must then be evacuated, leak tested, and commissioned using approved HVAC procedures.
The listing does not identify communication wire, condensate tubing, wall sleeves, adapters, line-set covers, or mounting accessories as included. Confirm all necessary components before beginning installation.
Frequently Asked Questions
What tube sizes are included?
The line set includes 3/8-inch and 5/8-inch copper tubing.
How long is the line set?
The listed tubing length is 50 feet.
Will it work with every ductless mini split?
No. The connected equipment must specify these exact refrigerant-line sizes.
Will a 50-foot installation require additional refrigerant?
It may. Check the condenser’s factory-charge allowance and additional-charge instructions.
Can unused tubing be coiled behind the condenser?
Follow the equipment manufacturer’s instructions. Excessive or improperly positioned coils can create installation and servicing concerns.
Confirm your equipment’s connection sizes, maximum piping length, vertical limit, and refrigerant requirements before purchasing this HVAC365 line set.
