Copper Insulation 3/4 – 1-Inch Wall x 72-Inch

Copper Insulation 3/4 delivers dependable thermal and moisture protection for properly sized copper refrigerant piping. Designed for residential and light-commercial HVAC applications, this flexible insulation helps reduce unwanted heat transfer and limits condensation on cold refrigerant lines.

This product features a nominal 3/4-inch inside diameter, a 1-inch insulation wall and a total length of 72 inches. Its flexible construction makes it easier to fit around compatible piping while creating a clean and professional finished installation. Always verify the outside diameter of the copper pipe before ordering.

Copper Insulation 3/4 Features

The closed-cell elastomeric construction of Copper Insulation 3/4 creates an effective barrier against moisture penetration. This is especially important for HVAC suction lines, where cold surface temperatures can create condensation when the pipe is left exposed or the insulation is damaged.

• Nominal 3/4-inch inside diameter
• 1-inch insulation wall thickness
• 72-inch section length
• Flexible closed-cell elastomeric foam
• Black exterior finish
• R-value of approximately R-7.5
• Temperature range from -297°F to 220°F
• Designed to help reduce condensation and energy loss

The closed-cell structure helps resist moisture absorption while supporting consistent thermal performance. When the insulation is installed correctly and every seam is properly sealed, it helps prevent humid air from reaching the cold copper surface.

Reliable Condensation Protection

Copper Insulation 3/4 helps control condensation on compatible refrigerant piping. Condensation can drip onto walls, ceilings, equipment platforms and other building materials. Over time, uncontrolled moisture can contribute to stains, deterioration and other avoidable problems around the HVAC installation.

The 1-inch wall provides a substantial insulating barrier between the copper line and the surrounding environment. This helps limit heat gain along the suction line and supports the intended operation of the air-conditioning or heat-pump system.

Pipe insulation is only one part of a properly installed refrigeration system. Correct refrigerant charging, line sizing and equipment matching remain essential. The insulation cannot correct an incorrectly installed or improperly operating HVAC system.

Installing Copper Insulation 3/4

Before installing Copper Insulation 3/4, confirm that the copper pipe is clean, dry and correctly sized for the insulation opening. The material should fit securely without excessive stretching or compression. Compressing the insulation can reduce its effective wall thickness and thermal performance.

Place adjoining sections closely together to avoid exposed areas. Seal longitudinal seams, joints and terminations using an adhesive or sealing method approved for closed-cell elastomeric insulation. Open gaps can allow humid air to contact the cold pipe and create condensation underneath the insulation.

Inspect elbows, fittings, valves and refrigerant connections carefully. These areas should receive continuous insulation coverage whenever required by the equipment manufacturer. When installing the product outdoors, follow the manufacturer’s recommendations for protection against sunlight, weather and physical damage.

Common HVAC Applications

Copper Insulation 3/4 can be used on compatible air-conditioning and refrigeration piping that requires a 3/4-inch insulation opening. It is suitable for new HVAC installations and for replacing deteriorated, missing or damaged pipe insulation.

Common applications include refrigerant suction lines serving residential split systems, heat pumps and other compatible refrigeration equipment. Required insulation thickness can vary according to the system, refrigerant line size, climate and local installation requirements.

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

Choosing the Correct Size

Correct sizing is important when selecting Copper Insulation 3/4. Insulation that is too large can leave air gaps around the pipe. Material that is too small may become stretched or compressed during installation. Either condition can reduce its effectiveness.

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

The 1-inch wall provides more insulation than many standard residential products. A licensed HVAC contractor should verify whether this wall thickness is appropriate for the equipment, application and local climate.

Complete the Refrigerant Line Installation

Combine Copper Insulation 3/4 with compatible products from our refrigerant copper line sets and accessories category. For helpful information about maintaining efficient HVAC performance, review the U.S. Department of Energy air-conditioner maintenance guidance.

Inspect the insulation periodically for cracks, open seams or physical damage. Repairing deteriorated areas promptly helps preserve the continuous thermal and moisture barrier needed for dependable long-term performance.