DuraVent DuraVent 5" x 8" DirectVent Pro Direct Vent Pipe - Galvanized Restrictor Disk

5" x 8" DirectVent Pro Galvanized Restrictor DiskThe DirectVent Pro 5" x 8" Inner Diameter Galvanized Restrictor Disk is a component that is normally used only in accordance with a specific appliance manufacturer’s installation instructions to restrict incoming combustion air. Features:Restricts Incoming Combustion AirUse Only in Accordance with Manufacturer's Installation InstructionsDirectVent Pro features tight inner connections for superb performance, with no gaskets or sealants required (unless spec...