The MRCOOL LineGuard MLG450 is a complete 12-foot line set cover kit designed for MRCOOL ductless mini split systems. This kit provides durable exterior protection for refrigerant lines while improving the appearance of your installation. The system includes three 4-foot straight covers, a bend, a wall penetration cover, and all required connectors, giving you full control over how the line set is routed and protected.
Uncovered lines can be damaged by weather exposure, UV light, and temperature swings, which may reduce system efficiency over time. A line set cover helps shield the refrigerant tubing and insulation, supporting long-term performance and reliability. It also creates a cleaner exterior look by hiding the lines behind a uniform protective housing. The MLG450 is sized for a single line set and is compatible with MRCOOL DIY and standard MRCOOL ductless systems.
Final Sale: All MRCOOL accessories are non-returnable and non-refundable.
Key Features
12-foot total coverage for standard mini split installations
Three 4-foot straight sections with connectors for smooth routing
Bend and wall hole cover included for complete protection
Designed to protect refrigerant lines from weather, UV exposure, and debris
Helps maintain system efficiency by reducing insulation wear over time
Creates a cleaner, more finished appearance on exterior walls
Lightweight components for easier handling and installation
Free Shipping on All Orders – We provide free standard delivery on all orders within the contiguous U.S.
Ground Shipping for Smaller Items – Accessories and lighter products ship via standard ground carriers such as FedEx, UPS, or similar.
Freight Delivery – Large items (HVAC/Heaters) ship via LTL freight. Drivers deliver to the curbside only; they cannot bring items into your home or garage.
Tracking Information – Tracking is typically provided within 3–5 business days after your order is placed.
Carrier Updates – Once tracking is issued, allow 1–2 business days for the carrier to populate shipment details.
Does this LineGuard kit fit all MRCOOL ductless mini split systems?
Yes, the MLG450 is compatible with MRCOOL DIY and standard MRCOOL ductless mini split systems. It is sized to fit one standard line set and is suitable for most residential exterior installations.
Can this cover be used for more than one line set?
No. The MLG450 is designed specifically for a single line set. If your installation has multiple line sets, you would need additional kits to cover each run.
Can the LineGuard be painted to match my home exterior?
Yes. The cover can be lightly prepped and painted if you want it to blend with siding or trim. A standard exterior-grade paint is typically recommended for best adhesion and durability.