Aprilaire®

ARNFB4 4" STI Fire Barrier, Fire Collar, Galvanized Steel

APRARNFB4 MFG #: ARNFB4
ARNFB4 4" STI Fire Barrier, Fire Collar, Galvanized Steel
  • Suitable For Use With: PVC
  • Expansion Begins: 320 deg F
  • Frame Material: Galvanized Steel
  • Manufacturer: Research Products Corporation
  • Manufacturer #: ARNFB4
  • Nominal Size: 4 in
  • Temperature Rating: Less than 120 deg F
  • Thickness: 32x to 64 x
The AprilAire ARNFB4 Fire Barriers are used anytime the 3” PVC pipe is cut through a fire wall. Check local code for requirements.

ARNFB4 4" STI Fire Barrier, Fire Collar, Galvanized Steel
  • Features
  • Rapid expansion - closes off burning pipes quickly
  • Small profile - use it in all the tight spots
  • Flexible & durable - no loose flakes (eye hazards)
  • High volume char - expands up to 60 times
  • Economical - lower installed cost