Insul-Tube
Insul-Tube 6RX048118 1-1/8" OD 6 ft NBR/PVC pipe insulation
Closed-cell NBR/PVC tube insulation for 1-1/8 in copper, R-2.9, rated -297 °F to 220 °F, plenum rated
- TypeTarps
- Size3/4"
- Operates down to -297 °F for extreme cold protection
- Withstands up to 220 °F continuous service temperature
- R-value 2.9 delivers effective thermal resistance
- Flame spread 70 and smoke developed 95 meet plenum safety
- Closed-cell NBR/PVC foam resists moisture and stays flexible
Insul-Tube 1-1/8" OD pipe insulation
This Insul-Tube product is a flexible NBR/PVC tube designed to insulate copper tubing with a 1-1/8 inch outside diameter. It comes in a six-foot length with a half-inch wall thickness and a closed-cell foam structure. The material carries a plenum rating and an R-value of 2.9 for thermal resistance.
Suitable for standard copper tube sizes.
Installers working with 3/4 inch nominal pipe or 1-1/8 inch copper tube sizes will find the unslit tube fits the intended application. The insulation operates between minus 297 and 220 degrees Fahrenheit. Buyers who need a different inside diameter, a slit version for retrofit, or a facing material should look at other options.
Half-inch wall thickness gives R-value 2.9
The half-inch wall provides the stated thermal resistance of 2.9, which determines the insulation performance for the specified pipe size. Flame spread index is 70 and smoke developed index is 95, meeting plenum requirements. Verify that the wall thickness matches the project specification before purchasing.
Highlights
- Operates down to -297 °F for extreme cold protection
- Withstands up to 220 °F continuous service temperature
- R-value 2.9 delivers effective thermal resistance
- Flame spread 70 and smoke developed 95 meet plenum safety
- Closed-cell NBR/PVC foam resists moisture and stays flexible
Specifications
| Brand | K-FLEX USA |
|---|---|
| Type | Tarps |
| Size | 3/4" |
Questions about this item
Does the 6 ft tube come pre-slit or with any adhesive tape included?
The tube is unslit and unfaced, so you will need to cut the seam yourself and supply your own tape or glue for sealing.
How do I decide between the 1-1/8 in OD size and the 3/4 in pipe size listed on the same line?
They describe the same tube — 1-1/8 in is the copper-tube outside diameter and 3/4 in is the nominal pipe size; choose the one that matches your pipe marking.
What does the R-value of 2.9 tell me about heat loss on a 6 ft run?
R-2.9 means each square foot of the 1/2 in wall resists heat flow at that rate; multiply by your temperature difference and surface area to estimate the actual BTU loss.
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