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professional-grade solution with adjustable depth and a secure locking mechanism
and lowering utility costs
allowing a total extension of up to 75 feet when used with additional line sets and couplers
Specifically designed for HVAC technicians
Built to last with corrosion-resistant components and robust warranties
Fortress 4.5" Coupler – LJ122W (White) | Lineset Cover Connector | MRCOOL Compatible A-09-HP-WMAH-115B professional-grade solution with adjustable depthThe Fortress 4. 5" Coupler LJ122W is designed to securely join two sections of 4. 5" lineset cover ducting, creating a clean, continuous run for HVAC refrigerant lines, drain hoses, and control wiring. This fitting is an essential component for any extended installation where additional duct length is needed. Part of the Fortress LD122 Series, this coupler is fully compatible and interchangeable with MRCOOL LineGuard, making it a reliable choice for
