This Aluminum Increaser 3 x 4 with 3 x 4 Inner Diameter from the Round Gas Vent series is a Type B gas component and consists of the duralock system for a tight seal.Use to increase vent diameter Additional sizes available through special order Double wall construction UL ListedADA Compliant: No Collection: Round Gas Vent Fuel Type: Natural Gas, Liquid Propane Height: 6-3 4 Inner Diameter: 3, 4 Material: Aluminum Pipe Class: Type B Pipe Shape: Round Style: Contemporary Modern Weight: 7
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