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

K-Flex Usa

K-Flex Usa 801-T-048278 Elastomeric Tee Pipe Fitting 2-7/8 in x 1-5/64 in

SKU CH-416J-20C4J

Insulates 2-7/8 in pipe tees with flexible Buna-N/PVC foam rated for -297 to 220 °F and UL 94 flame spread 25

  • Wide temperature range from -297 °F to 220 °F
  • Closed-cell foam insulation with R-value 3.2
  • Plenum-rated with flame spread index 25
  • Antimicrobial and flame-retardant Buna-N rubber/PVC
  • Flexible unslit tee fits 2-7/8 in tube outside diameter

K-Flex USA 801-T-048278 Elastomeric Tee Fitting

This elastomeric tee fitting connects three pipe sections in plumbing and HVAC systems. It is built for installers who need a flexible, closed-cell insulation piece that fits a 2 7/8 inch tube outside diameter. The unslit design requires placement before final pipe assembly.

Capacity and headroom: 1/2 in wall, R 3.2.

The 1/2 inch wall thickness delivers an R value of 3.2 for thermal control on hot or cold lines. It operates continuously from -297 °F to 220 °F, covering cryogenic and high-temperature duties. The Buna-N rubber and PVC blend resists microbial growth and meets a flame spread index of 25.

Replaces rigid tees and unslit wrap on 2 1/2 in pipe

Use this fitting to replace rigid insulated tees or field-wrapped insulation where vibration or thermal cycling cause gaps. The jump is worth it when a plenum-rated, UL 94 listed component is required and the unslit form can be installed during initial pipe layout. It is not for retrofit jobs where the pipe cannot be disconnected.

Highlights

  • Wide temperature range from -297 °F to 220 °F
  • Closed-cell foam insulation with R-value 3.2
  • Plenum-rated with flame spread index 25
  • Antimicrobial and flame-retardant Buna-N rubber/PVC
  • Flexible unslit tee fits 2-7/8 in tube outside diameter

Specifications

BrandK-FLEX USA

Questions about this item

Will the 2-7/8 in tee fit onto my existing 2-1/2 in copper pipe without an adapter?

Yes, the fitting is made for a 2-1/2 in pipe size and its 2-7/8 in inside diameter matches that tube outside diameter.

How can I verify the tee is performing correctly once installed?

The closed-cell Buna-N/PVC foam should feel firm and continuous, with no gaps at the joints, and the line temperature must stay between -297 °F and 220 °F.

Does the package include adhesive or tape for sealing the unslit tee, or do I need to buy them separately?

The tee ships unslit with no adhesive or tape included, so a compatible insulation adhesive and vapour-barrier tape must be purchased separately.

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