Fortress 4.5" Adjustable Flat Elbow (LD122) – Lineset Cover Fitting | MRCOOL Compatible

The Fortress 4.5" Adjustable Flat Elbow (LD122) is the perfect solution for routing HVAC linesets cleanly and professionally around exterior wall obstacles. Designed for installations requiring a directional change between 45° and 90°, this adjustable elbow makes it easy to maintain a neat and finished appearance on any flat surface.

Ideal for mini-split systems, heat pumps, and traditional HVAC installations, this fitting provides dependable protection for refrigerant lines, drain hoses, and control wiring while enhancing the overall look of your project. The LD122 elbow is fully compatible with the Fortress Series and interchangeable with MRCOOL LineGuard, making it an excellent choice for expansions, replacements, or new installs.

Crafted from heavy-duty UV-stabilized, fire-resistant PVC, this fitting is engineered to withstand over 2,000 hours of sun exposure and operate reliably in temperatures ranging from -4°F to 140°F. The smooth PVC surface is paintable using a brush, roller, or spray, allowing you to match any home or building exterior perfectly.

Key Features

• Adjustable 45°–90° Flat Elbow
  Easily navigate obstacles and route lines cleanly around corners on flat surfaces.
• 4.5" LD122 Compatibility
  Built for larger-capacity HVAC systems or multi-line installations requiring extra space.
• Durable, Weather-Resistant PVC
  UV-stabilized and fire-rated for long-lasting outdoor performance.
• Wide Temperature Rating
  Effective from -4°F to 140°F, ideal for all climates.
• Paintable Finish
  Customizable appearance to match siding, trim, or interior surfaces.
• Part of the Fortress Lineset Cover System
  Fully compatible with Fortress and MRCOOL LineGuard components.

Color Options

• White
  

Warranty

• 3-Year Limited Warranty

Applications

Perfect for:

• Mini-split systems
• Heat pumps
• Central A/C systems
• Residential or commercial HVAC installations
• Multi-line or large-capacity installs needing wider ducting

Why Buy From Us?

We carry the full selection of Fortress-compatible and MRCOOL LineGuard fittings, covers, and accessories at competitive prices. Whether you’re a homeowner, contractor, or installer, you’ll find exactly what you need to complete your HVAC lineset cover system with a clean, professional finish.