This is a pre-charged copper line set extension for EG4 mini-split systems, built for installers who need extra reach between the outdoor condenser and indoor air handler without brazing a custom run. It gets your lineset from point A to point B without the guesswork of field-fabricated flares.
EG4 mini-split line sets are built to standard copper refrigerant tubing diameters, matched to the liquid and suction port sizes on compatible EG4 condensers and air handlers. A pre-charged extension set is designed to save you from an on-site brazing job, but diameter accuracy is still non-negotiable — mismatched line sizes cause pressure drop, poor capacity, and premature compressor wear. 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
- Total length: 26 ft, sized for extended runs between indoor and outdoor units.
- Liquid line diameter: 1/4 in.
- Suction line diameter: 3/8 in.
- Supplied pre-charged — verify your system's specified line diameters match 1/4" x 3/8" before purchase.
- Does NOT fit EG4 mini-split systems that call for line diameters other than 1/4 in liquid and 3/8 in suction — check your indoor/outdoor unit spec sheet first.
Coiled pre-charged line sets kink easily at tight bends near the wall penetration, and a kink restricts refrigerant flow long before it ever fails visibly. Uncoil the set slowly and use a spring bender at any bend under 6 inches radius to keep the copper round and the charge intact — a crushed line here means a comeback call for a refrigerant leak later. Before final connection, wipe flare mating surfaces and apply a thin coat of Nylog Blue sealant on the flare faces to protect against micro-leaks at the union. Torque flare nuts to the OEM-specified value rather than "hand tight plus a turn," consistent with EPA 608 refrigerant handling practice — over-torquing distorts the flare and under-torquing invites a slow leak.
Key Benefits
- Pre-charged design reduces on-site brazing and refrigerant recovery/recharge steps.
- Matched 1/4" x 3/8" diameters correspond to common EG4 mini-split port sizing.
- 26 ft length supports longer indoor-to-outdoor unit runs in a single extension.
- Copper construction standard for mini-split refrigerant line applications.
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Length | 26 | ft |
| Liquid Line Diameter | 1/4 | in |
| Suction Line Diameter | 3/8 | in |
| 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 1/4 in liquid line and 3/8 in suction line diameters, including reference to EG4 12K BTU and EG4 24K Hybrid AC/DC mini-split systems.
- Does NOT fit EG4 or other mini-split systems specifying line diameters other than 1/4 in x 3/8 in.
- Confirm your indoor and outdoor unit's line diameter specification before ordering — line set diameter must match exactly on both ends.
Compliance & Environment Table
| Item | Guideline |
|---|---|
| Refrigerant Handling | Follow EPA Section 608 practices for handling pre-charged refrigerant lines and preventing intentional or accidental release. |
| Flare Connections | Torque to OEM-specified values; do not over- or under-tighten flare nuts. |
FAQ
What size are the liquid and suction lines on this extension set?
This set uses a 1/4 inch liquid line and a 3/8 inch suction line, at a total length of 26 feet.
Is this line set pre-charged with refrigerant?
Yes, this is listed as a pre-charged line extension set, designed to extend the run between your EG4 outdoor and indoor units.
Will this fit any EG4 mini-split system?
It fits EG4 mini-split systems specified with 1/4 inch liquid and 3/8 inch suction line diameters. If your EG4 system uses different line diameters, this extension set is not compatible. Confirm your specific model's line size before ordering.
Can I cut this line set to a shorter length?
[NEEDS VERIFICATION] The manufacturer data provided does not specify whether this pre-charged set can be field-cut and re-flared. Refer to the Resources tab for manufacturer installation guidance before modifying length.
Warranty & Registration
[NEEDS VERIFICATION] Manufacturer warranty terms for this line extension set are not included in the provided data. Refer to the "Resources (System Manuals and Warranty)" Tab above on this page for current EG4 warranty coverage, or contact us and we'll help you track it down before you order.
