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The TUNDRA PR12138UWTU0 is a semi-slit closed cell polyolefin pipe insulation wrap designed for thermal protection on residential and light commercial piping systems. Sized at 1.25 inches inner diameter and 6 feet in length with a 1/2 inch wall thickness, it provides effective resistance against heat transfer in both hot and cold line applications. The closed cell structure resists moisture absorption, helping to reduce condensation on cold water and refrigerant lines during warm months. The fire-retardant formulation meets common safety requirements for building insulation. Plumbers, HVAC technicians, and refrigeration service pros install this wrap on exposed or accessible piping wherever thermal performance and condensation control are required.
This insulation wrap is suited for cold water supply lines, hot water distribution lines, refrigeration suction lines, and air conditioning line sets. It is also used on a broad range of other piping applications where freeze protection in winter or condensation reduction in summer is a priority. The semi-slit design allows the wrap to be opened along its length and seated directly over existing pipe runs without cutting or special tooling, making it practical for retrofit and new installation work alike.
Designed as an OEM-style replacement and standard-fit insulation wrap for 1.25 inch inner diameter pipe used in cold water, hot water, refrigeration, and air conditioning systems.
Installation is typically performed by licensed plumbers or HVAC technicians as part of pipe insulation work on new construction or retrofit projects. Shut off and drain the affected pipe section before installing where possible, and ensure pipe surfaces are clean and dry for best adhesion at seams. The semi-slit channel should be pressed firmly closed along the seam; use compatible insulation tape to seal the slit and any end joints for maximum thermal performance. Follow local mechanical and plumbing codes for required insulation R-values and fire ratings in your jurisdiction.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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