Insul-Tube
Insul-Tube Pipe Insulation 1-3/8" OD 6 ft NBR/PVC 6RX048138
Closed-cell NBR/PVC tube insulates 1-3/8 in. copper tubing with R-2.9 thermal resistance and plenum-rated fire performance
- TypeTarps
- Size1"
- Operates down to -297 °F for extreme cold protection
- Withstands 220 °F continuous heat without degradation
- R-value 2.9 delivers efficient thermal resistance
- Flame spread 71 and smoke developed 96 meet plenum requirements
- Closed-cell NBR/PVC foam resists moisture and stays flexible
Product identity
Insul-Tube pipe insulation tube in NBR/PVC closed-cell foam, 1-3/8 inch inside diameter and six-foot length, supplied unslit for custom cutting. Suits plumbers and HVAC installers protecting copper or iron pipe runs.
Who it suits
Fits one-inch nominal pipe and 1-3/8 inch copper tube; plenum-rated with flame spread 71 and smoke developed 96 for commercial duct penetrations. Unsuitable for installers needing pre-slit self-seal sleeves or diameters outside the stated size.
Installation notes
Flexible closed-cell tube slides over pipe before connection; installer must slit and seal joints with compatible adhesive tape. Errors include stretching material thin at bends and leaving gaps that reduce the rated R-value of 2.9.
Highlights
- Operates down to -297 °F for extreme cold protection
- Withstands 220 °F continuous heat without degradation
- R-value 2.9 delivers efficient thermal resistance
- Flame spread 71 and smoke developed 96 meet plenum requirements
- Closed-cell NBR/PVC foam resists moisture and stays flexible
Specifications
| Brand | K-FLEX USA |
|---|---|
| Type | Tarps |
| Size | 1" |
Questions about this item
What copper tube size must I already have for this 1-3/8" OD insulation to fit?
It fits copper tube size 1 3/8 in and pipe size 1 in, matching the 1-3/8" outside diameter.
Will the unfaced NBR/PVC tube affect the flame spread or smoke ratings of my existing plenum installation?
Flame spread index is 71 and smoke developed index is 96, and the product is plenum rated.
How do I confirm the R-value after installing the 6-foot length?
The insulation provides an R-value of 2.9 when installed as supplied.
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