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Black flexible elastomeric tee pipe fitting with closed-cell foam structure

Nomaco Kflex

Nomaco Kflex 801-T-068448 4-1/2" x 1-1/4" Elastomeric Tee Pipe Fitting

SKU CH-A80A-5BRG0

Elastomeric tee fitting insulates 4-1/2 in tube with closed-cell Buna-N/PVC foam rated for -297 to 220 °F, R-4.6, flame spread 25, plenum rated and antimicrobial

  • TypeTarps
  • Operates down to -297 °F for cryogenic systems
  • Withstands 220 °F continuous heat in hot lines
  • Flame spread index 25 meets strict fire codes
  • R-value 4.6 delivers strong thermal resistance
  • Antimicrobial closed-cell foam resists mould growth

4-1/2" x 1-1/4" Elastomeric Tee Fitting

This Nomaco Kflex pipe fitting insulates a 4-1/2 inch tee connection with closed-cell Buna-N rubber and PVC foam. It carries a UL 94 flame rating and a flame spread index of 25 for plenum-rated installations. The material resists antimicrobial growth and remains flexible from -297 to 220 degrees F. Contractors use it to maintain thermal efficiency on commercial HVAC and refrigeration lines.

Verify pipe size and insulation thickness before

Confirm the tee matches a 4 inch pipe size with a 4-1/2 inch tube outside diameter and a 3/4 inch wall thickness. The unslit design requires the fitting to be slipped over the pipe before the joint is assembled. Ensure the R-value of 4.6 meets the project specification and that the operating temperature range suits the system fluid. Local codes may restrict use in certain jurisdictions.

Replaces damaged or missing tee insulation

Use this fitting when the original tee insulation has degraded, was omitted during installation, or must be upgraded to a plenum-rated product with antimicrobial resistance. The jump is worth it when fire safety standards require a flame spread index of 25 or when the system operates near the -297 to 220 degree F extremes. It is not suited for straight pipe sections or reducer connections.

Highlights

  • Operates down to -297 °F for cryogenic systems
  • Withstands 220 °F continuous heat in hot lines
  • Flame spread index 25 meets strict fire codes
  • R-value 4.6 delivers strong thermal resistance
  • Antimicrobial closed-cell foam resists mould growth

Specifications

BrandK-FLEX USA
TypeTarps

Questions about this item

What comes inside the package and do I need any extra items to install it?

The box contains the elastomeric tee fitting made from Buna-N rubber and PVC with a closed-cell foam structure. It is supplied unslit, so no separate adhesive or tape is required for basic installation.

Which size version should I select for a four-inch pipe with a four-and-a-half-inch outside diameter?

Choose the fitting marked 4-1/2" x 1-1/4" because its inside diameter matches a 4-1/2" tube OD and it is rated for a 4" pipe size.

What does the R-value of 4.6 mean once the fitting is on the pipe?

An R-value of 4.6 indicates the thermal resistance of the 3/4" wall thickness, helping maintain temperature between -297 °F and 220 °F while meeting a flame spread index of 25 and UL 94 rating.

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