The MRCOOL DIYCOUPLER-3858K75C DIY 24–36K BTU Line Set Coupler Kit is designed to extend compatible MRCOOL DIY mini-split HVAC systems using existing line sets. It connects refrigerant lines securely while including a 75-foot communication cable for reliable communication between indoor and outdoor units. Ideal for DIY-series ductless heat pumps and air conditioners, this kit simplifies installation without requiring complex line-set modifications. Its durable construction supports dependable operation, while the extended cable length provides greater flexibility for equipment placement. The coupler kit helps reduce installation time, improve system connectivity, and support efficient HVAC performance.
