Description
Product Overview
Complete Mini-Split Installation Kit — 25-Foot Line Set Included
The MRCOOL MC25-3858 installation kit includes a 25-foot pre-insulated 3/8×5/8 inch copper line set, communication wire, and drain hose — everything needed to connect your indoor air handler to the outdoor condenser. The 25-foot length handles most residential installations where the outdoor unit is on a different wall or floor from the indoor unit.
Technical Specifications
| Brand | MRCOOL |
|---|---|
| Model / SKU | MC25-3858 |
| Series | MRCOOL Accessories |
| Product Type | Accessory | Installation Kit |
| Coverage Area | N/A |
| Refrigerant | Compatible with R-410A, R-454B, R-32 |
| Electrical | N/A |
| Weight | 16.0 lbs (7.3 kg) |
| Warranty | MRCOOL Manufacturer Warranty (register within 30 days) |
Installation & Product Tips
- Measure the actual routing path before ordering — 25 feet covers most standard residential installations
- The 3/8×5/8 diameter is for 9K–18K BTU systems
- Include 10–15% extra length in your measurement for bends and routing
- Route the drain hose with a minimum 1/4-inch per foot slope for proper condensate drainage
- A licensed HVAC technician must braze connections and evacuate the system before charging
Frequently Asked Questions
What is included in this kit? +
What BTU systems use 3/8×5/8 line sets? +
Is 25 feet enough for my installation? +
Is this line set pre-charged? +
What refrigerants are compatible? +
Warranty Information
All MRCOOL products sold by HVACProSales come with the full MRCOOL manufacturer warranty. Register your product at the MRCOOL registration portal within 30 days of installation to activate full warranty coverage. Residential products typically include a 7-year parts warranty and 5-year compressor warranty when registered. Commercial products carry a 5-year parts warranty.
Why Buy From HVAC PRO Sales
15+ Years HVAC Experience | 500+ Systems Installed | Authorized MRCOOL Dealer
- Authorized MRCOOL Dealer — Official warranty support
- 15+ Years HVAC Industry Experience
- Expert Pre-Sale Technical Consultation
- Price Match Guarantee on all authorized MRCOOL products
- Same-day processing on in-stock orders over $199
Need help selecting the right system? Contact our HVAC experts for free pre-sale consultation. →
Installation & Troubleshooting Guides
Model / SKU
MC25-3858
Equipment Selection Verification
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