This is a pre-charged copper line extension set for EG4 mini-split systems, built to add reach between your indoor and outdoor units without a separate vacuum/charge procedure. If your install run is longer than the stock lineset allows, this extension gives you the extra length in a factory-sealed, ready-to-connect assembly.
Copper line sets are the connective path for refrigerant between your indoor evaporator and outdoor condenser, so diameter accuracy and a clean, leak-free charge matter more than almost any other spec on the system. This 16 ft extension set is sized to 3/8" suction and 1/4" liquid diameters, matching that specific pipe combination on compatible EG4 equipment. Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
Critical Fitment & Requirements
- Suction line diameter: 3/8 inch.
- Liquid line diameter: 1/4 inch.
- Length: 16 feet.
- Ships pre-charged — factory sealed for connection to matching line diameters.
- NOT compatible with EG4 mini-split systems that use suction or liquid line diameters other than 3/8" and 1/4" [NEEDS VERIFICATION for specific BTU ranges].
- Not confirmed for use with non-EG4 brand mini-split systems — fitment data outside EG4 equipment is not provided by the manufacturer source.
Pre-charged linesets are convenient, but the quick-connect or flare fittings at each end are still the most common failure point on the job. Over-torquing or under-torquing a flare nut on a 1/4" or 3/8" connection can leave a slow leak that shows up as reduced capacity months later, not on day one. Check flare surfaces for scoring before assembly and torque to the fitting manufacturer's spec with a calibrated torque wrench rather than "feel." Confirm your finished connections hold vacuum per EPA 608 refrigerant handling practices before you release the factory charge into the system.
Key Benefits
- Pre-charged design eliminates a separate vacuum/evacuation step for the extension length itself.
- Copper construction sized specifically to 3/8" suction and 1/4" liquid diameters for accurate refrigerant flow matching.
- 16 ft length adds reach for indoor/outdoor unit placements beyond stock line set runs.
- Matched diameter pairing (3/8" x 1/4") reduces guesswork when extending compatible EG4 line sets.
| Spec | Value | Unit |
|---|---|---|
| Suction Line Diameter | 3/8 | inch |
| Liquid Line Diameter | 1/4 | inch |
| Length | 16 | ft |
| Charge State | Pre-Charged | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Fits: EG4 mini-split systems specified with 3/8" suction and 1/4" liquid line diameters.
- Does NOT fit: EG4 or other mini-split systems using different suction/liquid line diameter combinations [NEEDS VERIFICATION for exact BTU cutoffs].
- Does NOT include: confirmed cross-brand compatibility data — treat as EG4-specific unless verified otherwise.
| Category | Detail |
|---|---|
| Material | Copper (line set) |
| Refrigerant Handling | Pre-charged; follow EPA 608 recovery/handling practices when connecting or servicing |
FAQ
What size are the liquid and suction lines on this extension set?
The liquid line is 1/4 inch and the suction line is 3/8 inch.
How long is this line extension set?
It is 16 feet long.
Does this line set come pre-charged with refrigerant?
Yes, this is a pre-charged extension set, as stated in the product name and specifications.
Will this fit any mini-split brand?
This extension set is sized for EG4 mini-split systems using 3/8 inch suction and 1/4 inch liquid line diameters. Fitment for other brands or other EG4 pipe diameters is not confirmed in available specifications.
Warranty & Registration
Manufacturer warranty terms for this line extension set are not detailed in the provided specifications. Refer to the "Resources (System Manuals and Warranty)" Tab above on this page for manufacturer warranty documentation, or contact us before you order if you need confirmation — we always reply back.
