The MRCOOL DIY25-3858 25 ft Quick Connect Line Set is a pre-charged refrigerant lineset designed specifically for MRCOOL DIY mini-split systems that use 24,000 and 36,000 BTU indoor air handlers. Built for fast, technician-free installation, it uses Quick Connect fittings (no vacuuming or brazing required) and includes the properly sized 3/8" liquid line and 5/8" suction line to connect the outdoor condenser to the indoor unit.
Country of Origin: Varies by production batch
Key Features / Specifications
- Brand: MRCOOL
- Model / Part number: DIY25-3858
- Lineset length: 25 ft
- Line sizes: 3/8" liquid line × 5/8" suction line
- Connection type: Quick Connect fittings
- Designed for: MRCOOL DIY 24K and 36K systems (single-zone and compatible multi-zone configurations that require this line size)
- Refrigerant (pre-charged): Varies by system generation/batch (commonly listed as R-410A on earlier DIY line sets and R-454B on newer/5th Gen DIY line sets)
- Installation note (common guidance): If excess length is not needed, coil/bundle it neatly rather than cutting; use proper routing to avoid kinks
Ideal For:
- Replacing or adding a 25 ft lineset for MRCOOL DIY 24,000 or 36,000 BTU mini-split installations
- DIY installs where Quick Connect fittings eliminate vacuum pumps, gauges, and brazing
- Setups needing the correct 3/8" × 5/8" line sizing for proper fit and performance