Nomaco THERMTC-158112 Rubber Pipe Insulation

Product Description

The NOMACO THERMTC-158112 is a closed-cell rubber pipe insulation section designed to reduce heat gain and condensation on cold piping systems. It features a 1.625-inch inner diameter, a 1.5-inch wall thickness, and a 6-foot length per section. The thick wall construction delivers high thermal resistance, making it well suited for refrigerant suction lines, chilled water piping, and domestic cold water lines where condensation control is critical. Licensed plumbers, HVAC technicians, and mechanical insulation contractors typically handle installation on both new construction and retrofit projects.

This insulation section fits 1.5-inch CTS (copper tube size) and 1.25-inch IPS (iron pipe size) piping, covering the most common pipe sizes found in residential and light commercial plumbing and HVAC systems. The 6-foot section length reduces the number of joints required per run, which helps maintain a continuous thermal barrier. It is appropriate for indoor applications on chilled water lines, domestic cold water supply, and refrigerant suction lines where energy efficiency and moisture control are priorities.

Key Features

• 1.625-inch inner diameter fits 1.5-inch CTS and 1.25-inch IPS pipe
• 1.5-inch wall thickness provides high thermal resistance and condensation control
• 6-foot section length minimizes joints and maintains insulation continuity
• Closed-cell rubber construction resists moisture absorption
• Flexible material conforms to piping runs and eases installation in tight spaces

Compatibility

Designed for use on 1.5-inch CTS copper tube and 1.25-inch IPS iron or steel pipe, typical in residential and light commercial plumbing, chilled water, and HVAC refrigerant suction line applications.

Installation Notes

Shut off and depressurize the piping system before installing insulation on active lines. Slide the insulation over the pipe or slit lengthwise and use a compatible rubber insulation adhesive to seal all joints and seams, preventing moisture ingress. Mechanical insulation work on commercial systems may be subject to local building codes and ASHRAE 90.1 energy requirements. Avoid compressing the wall thickness during installation, as compression reduces thermal performance.

Technical Specifications

• Inner Diameter: 1.625 inches
• Wall Thickness: 1.5 inches
• Length: 6 feet per section
• Compatible Pipe Size (CTS): 1.5 inches
• Compatible Pipe Size (IPS): 1.25 inches
• Material: Rubber (closed-cell)

Standard Information

• Brand: NOMACO
• Manufacturer Part Number: THERMTC-158112