Lennox 56N69 

Lennox 56N69 – Cerroset 612803500009 is a 35-foot insulated copper lineset designed for standard air conditioning and heat pump installations. This pre-insulated 3/8 inch liquid line and 3/4 inch suction line combination delivers reliable refrigerant flow, corrosion resistance, and long-term thermal protection for residential and light commercial systems. The plain-end design supports easy brazing and custom routing during system replacement, upgrade, or new construction.

Features and specifications:
• Size: 3/8 inch liquid line x 3/4 inch suction line
• Wall thickness: 3/8 inch with factory-applied insulation
• Length: 35 feet for extended installation reach
• Plain-end copper tubing for flexible connection and field cutting
• Compatible with standard HVAC refrigerants (including R-410A and R-454B where applicable)
• Closed-cell black insulation reduces thermal loss and minimizes condensation

Suitable for split-system air conditioners and heat pumps requiring a 3/8 x 3/4 lineset, this assembly helps maintain system efficiency, reduces energy transfer, and supports clean, professional installations. Ideal for Lennox replacement applications as well as universal use across most major HVAC brands.