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Flame-rated Hot Line Tube Isolator Insert

This through-stud isolator is designed for metal studs/brackets, providing positioning support and dissimilar metal isolation for copper, CPVC and PEX tubing. The isolator’s red color signifies hot water piping for easy identification.

Key features:

  • Integrates with HoldRite #121 and #125 series brackets
  • Meets UL 94 V-2 requirements
  • Off-center hole design allows for cross-over without fittings
  • Fits in 1-3/8 in. or 1-11/32 in. Holes
  • Material: polypropylene, UL94V-2, blue
  • Temperature range: -10 °F to 180 °F
Where to Buy
SKU Pipe Size
424-RR 1/2 in. CTS
425-RR 3/4 in. CTS
426-RR 1 in. CTS
More Details

Common Applications

  • Vertical
  • Tubing isolation
  • Through-stud isolation
  • Horizontal

Approvals & Listings

  • UL 94 V-2
  • UPC / IPC / IAPMO listed
  • UL Ratings