A professionally installed mini-split should look as good on the outside as it performs on the inside. Exposed refrigerant lines, drain hoses, and wiring can quickly ruin curb appeal—and worse, they’re vulnerable to UV damage, weather, pests, and accidental impact. The MRCOOL MLG450 Line Guard 4.5" Line Set Cover Kit (16-Piece) is a complete solution designed to protect, organize, and conceal your line set for long-term reliability and a clean finish.

The Problem

• Sun exposure degrades insulation and wiring over time

• Rain, wind, and debris accelerate wear

• Uncovered lines reduce property value and visual appeal

• DIY covers often don’t fit or crack outdoors

The Solution: MRCOOL MLG450 Line Guard

This 16-piece system provides everything needed to route and hide mini-split line sets neatly along exterior walls. Built from durable, UV-resistant PVC, the MLG450 resists cracking and discoloration while maintaining a professional appearance season after season.

Why it works

• Full coverage for refrigerant lines, drain, and control wiring

• 4.5" channel accommodates most standard mini-split line sets

• Modular pieces (straight sections, elbows, wall caps, couplers) for clean routing

• Paintable finish to match siding or trim

• Installer-friendly snap-together design saves labor time

Best Use Cases

• New mini-split installations that need a finished look

• Replacing brittle or undersized covers on older systems

• Residential or light commercial exteriors where appearance matters

Pro Tip

Install the Line Guard after pressure testing and evacuation but before final wall sealing. This ensures a tight, straight run and avoids rework.

Shop the complete solution:

MRCOOL MLG450 Line Guard 4.5" Line Set Cover Kit (16-Piece)