
Mini Split Line Set Cover Buying Guide
Mini split line set covers conceal the unsightly refrigerant/drain lines and wiring connecting your indoor and outdoor unit. Installing a line set cover makes your installation look professional and clean. It also protects your lines and wiring from exposure to the elements, including UV rays, which can break down insulation over time.
As an added benefit, line set covers are paintable, so you can match the color of your siding and preserve your home's decor.
Line Set Cover Parts
The illustration below depicts the most common pieces in a typical mini split line set cover installation.
1. Horizontal Elbow: Used to turn on the installation wall to avoid obstacles such as windows, etc.
2. Split Line Tube: Conceals and protects the line set, drain tubing, and connecting wire from the elements
3. NR - End Socket: Used to seal the line set cover at the condenser
4. Vertical Elbow: Used to turn into or away from the wall of installation (Go around corners, under soffits, etc.)
5. Socket/Coupling: Used to connect two split line tubes (CD) in a straight run
6. Wall Cover: Used to seal around a wall penetration
Line Set Cover Sizing
Line set covers come in several sizes. The sizing chart below will help you quickly find the cover that is correctly sized for your application. It shows how many line sets of a particular size will fit into each diameter cover.
Cover Size | # of 1/4" x 3/8" Line Sets | # of 1/4" x 1/2" Line Sets | # of 1/4" x 5/8" Line Sets | # of 3/8" x 5/8" Line Sets |
3" (Mitsubishi CD-75) (Fortress LD92) | 1 | 1 | 1 | 0 |
4" | 2 | 2 | 1 | 1 |
6" (Mitsubishi CD-140) | 3 | 3 | 2 | 2 |
Note: 1 Line Set = 1 Suction and Liquid Line, Drain Tubing, and Communication Cable. |
Common Line Set Covers
Below are links to the most common line set cover pieces for basic applications.
![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
Mitsubishi Models | Mitsubishi Models | Mitsubishi Models | Mitsubishi Models | Mitsubishi Models | Mitsubishi Models |
CD-75 | NR-75 | NE-75 | NC-75 | NS-75 | NW-75 |
CD-100 | NR-100 | NE-100 | NC-100 | NS-100 | NW-100 |
CD-140 | NR-140 | NE-140 | NC-140 | NS-140 | NW-140 |
Fortress Models | Fortress Models | Fortress Models | Fortress Models | Fortress Models | Fortress Models |
LD92 | LEN92 | LK92 | LCO92 | LJ92 | LW92 |
LD122 | LEN122 | LK122 | LCO122 | LJ122 | LW122 |
Specialized Line Set Covers
The following specialized line set covers are designed for more complex installations with unique needs.
![]() | NY - Simple Wall Cover Used to seal around wall penetrations. We recommend NW instead, as it is easier to install. |
![]() | NX - Universal Horizontal Elbow Used to create angles between 45° to 90° on the installation wall. Available Sizes Fortress: LKA92, LKA122 |
![]() | NZ - Universal Vertical Elbow Used to create angles between 45° to 90° into or away from the installation wall. Available Sizes Fortress: LCA92, LCA122 |
![]() | NM - 45° Horizontal Elbow Used to create angles of 45° on the installation wall. Available Sizes |
![]() | NU - 45° Vertical Elbow Used to create angles of 45° into or away from the installation wall. Available Sizes |
![]() | NK - Wall Entry Fitting Used to seal the penetration when the line set runs perpendicular to the entry wall. Available Sizes |
![]() | NT - T-Joint Used to split the path of a line-hide installation. Available Sizes |
![]() | NA - Corner Cap/Soffit Entry Fitting Used to seal around the penetration in the soffit. Available Sizes |
![]() | NF - Flexible Joint Used to connect segments for unique applications. Available Sizes |
See more options from Mitsubishi
See more options from Fortress
Line Set Cover FAQs
Here are some common questions we get about line set covers.
Why should I install line set covers?
Line set covers can protect your sensitive mini split lines and wiring from UV and fire damage. They are made of high-quality PVC with UV inhibitors for outdoor service in all weather conditions.
Enclosing the lines also creates a cleaner look and improves curb appeal. They sit flush with the wall, eliminating insect or bird nests that could form in the gap.
Can UV rays really damage my line set?
The insulation used in line sets breaks down over time. Direct exposure to sunlight and the elements hastens this breakdown.
Can I paint my line set covers?
Yes! Line set covers can be painted with most house paints to match your exterior decor.
How do you install line set covers?
Installation is a breeze with modular design and snap-on components. Any necessary screws are included with the products.
Can I use line set covers indoors?
Yes! Use line set covers anywhere you want to conceal cabling, piping, or wiring.