Copper Insulation 1-1/8 – 1-Inch Wall x 72-Inch

Copper Insulation 1-1/8 provides dependable thermal protection for properly sized copper refrigerant piping in residential and light-commercial HVAC applications. Its flexible, closed-cell elastomeric construction helps reduce unwanted heat transfer while limiting condensation on cold refrigerant lines.

This insulation features a nominal 1-1/8-inch inside diameter, a substantial 1-inch wall thickness and an overall length of 72 inches. Its flexible construction makes it easier to install around compatible piping while producing a clean, professional finish. Always verify the outside diameter of the copper pipe before ordering.

Copper Insulation 1-1/8 Features

The closed-cell structure of Copper Insulation 1-1/8 creates an effective barrier against moisture penetration. This feature is especially important for HVAC suction lines because their cold surface temperatures can produce condensation when the pipe is exposed or inadequately insulated.

• Nominal 1-1/8-inch inside diameter
• 1-inch insulation wall thickness
• 72-inch section length
• Flexible closed-cell elastomeric material
• Black exterior finish
• Designed to reduce heat transfer
• Helps control condensation and moisture
• Temperature range from -297°F to 220°F

The closed-cell construction helps resist moisture absorption and supports consistent thermal performance. When installed correctly, the insulation creates continuous coverage around the pipe and helps prevent humid air from reaching the cold copper surface.

Thermal and Condensation Protection

Copper Insulation 1-1/8 helps control condensation on compatible refrigerant piping. Uncontrolled condensation can drip onto ceilings, walls, equipment platforms and other nearby materials. Maintaining proper insulation can reduce the possibility of moisture stains and damage around the HVAC installation.

The 1-inch wall creates a substantial insulating barrier between the refrigerant line and the surrounding environment. This helps limit unwanted heat gain along the suction line and supports the efficient operation of compatible air-conditioning and heat-pump systems.

Pipe insulation is one component of a properly designed refrigeration system. Correct equipment matching, refrigerant charging and line sizing are also essential. Insulation cannot correct an incorrectly installed or improperly operating HVAC system.

Installing Copper Insulation 1-1/8

Before installing Copper Insulation 1-1/8, confirm that the copper pipe is clean, dry and correctly sized for the insulation opening. The material should fit securely around the pipe without being excessively stretched or compressed.

Compression can reduce the insulation’s effective wall thickness and thermal performance. Insulation that is too loose may leave air spaces around the pipe and make it more difficult to create a continuous moisture barrier.

Position adjoining sections closely together and seal all seams, joints and terminations with an adhesive or sealing method approved for closed-cell elastomeric insulation. Open gaps may allow humid air to contact the cold pipe, increasing the possibility of condensation beneath the material.

Pay special attention to elbows, fittings, valves and refrigerant connections. These areas should maintain continuous insulation coverage whenever required. For outdoor applications, follow the manufacturer’s recommendations for protecting the material against sunlight, weather and physical damage.

Common HVAC Applications

Copper Insulation 1-1/8 can be used on compatible refrigeration and air-conditioning piping that requires a nominal 1-1/8-inch insulation opening. It is suitable for new HVAC installations and for replacing missing, deteriorated or damaged insulation.

Typical applications include larger refrigerant suction lines serving split-system air conditioners, heat pumps and other compatible refrigeration equipment. The necessary line diameter and insulation thickness depend on the specific equipment, refrigerant circuit, line length, climate and applicable installation standards.

This product includes the pipe insulation only. Copper tubing, refrigerant, adhesive and other installation accessories are sold separately. Refrigerant system installation and service should be performed by a qualified HVAC professional following applicable codes, safety procedures and environmental regulations.

Selecting the Correct Insulation Size

Correct sizing is essential when choosing Copper Insulation 1-1/8. Insulation that is too large can leave unwanted air gaps around the pipe. Material that is too small can become stretched or compressed during installation, reducing its effectiveness.

Measure the outside diameter of the copper line and compare it with the nominal inside diameter of the insulation. Do not select pipe insulation based only on the HVAC system’s tonnage because refrigerant line dimensions can vary according to the equipment model and installation requirements.

The 1-inch wall provides a thicker thermal barrier than many standard residential insulation products. A licensed HVAC contractor should confirm that the dimensions and wall thickness are suitable for the equipment and intended application.

Complete Your HVAC Installation

Pair Copper Insulation 1-1/8 with compatible materials from our refrigerant copper line sets and accessories category. For additional information about maintaining efficient HVAC operation, review the U.S. Department of Energy air-conditioner maintenance guidance.

Inspect installed insulation periodically for cracks, open seams, deterioration or physical damage. Promptly repairing damaged areas helps maintain the continuous thermal and moisture barrier required for dependable long-term performance.