MRCOOL DIY 5th Gen 25 Ft. Pre-Charged Quick Connect Line Set, 1/4" x 1/2", for DIY 18K Indoor Mini Split Air Handler (DIY25-1412-O)
The MRCOOL 5th Gen DIY Line Set is a required component for installing your MRCOOL DIY ductless mini-split system. This 25-foot model is pre-charged with environmentally friendly R-454B refrigerant and works with MRCOOL's DIY 5th Gen 18K air handler units, featuring 1/4” liquid and 1/2” suction lines.
Equipped with Quick Connect fittings, the line set allows for fast, tool-free installation—no vacuuming, charging, or special certifications needed. Built with durable, kink-resistant materials and a leak-proof design, it ensures long-lasting, efficient performance. Available in multiple lengths, it’s the key to making your HVAC setup truly DIY-friendly.
| Series |
5th Gen DIY Line Set - R-454B |
| Compatible Air Handlers |
18K 5th Gen DIY |
| Line Set Length |
25 ft |
| Lineset Fitting Type |
Quick-Connection |
| Gross Dimensions |
32.09" D x 4.92" H x 32.09" W |
|
Color |
White |
|
Color Family |
Bronze/Copper Metallic |
|
Refrigerant Type |
R-454B |
|
Refrigerant Volume (Oz) |
2.12 |
|
Liquid Line Size |
1/4 |
|
Suction Line Size |
1/2 |
|
Registered Warranty |
N/A |
| Has Batteries | No |
|
Contains Electronics |
No |
|
Contains Chemicals |
Yes |
|
Contains Aerosol |
Yes |
|
Contains Compressed Gas |
Yes |
|
Proposition 65 Warning |
Yes |
|
Restricted States |
GU;PR;VI |
|
Net Weight (Lbs) |
12.1 |
|
Gross Weight (Lbs) |
16.5 |
30-Day Returns
We want you to be completely satisfied with your purchases. If something isn’t quite right, you can return your items within 30 days of delivery. For more details visit our return and refund policy page.