DuraVent DuraVent 3" Inner Diameter - FasNSeal AL29-4C Special Gas Vent Pipe - Single Wall - 3" to 4" Tappered Increaser

FasNSeal Collection 3 Inch x 4 Inch Tapered IncreaserWarranty Notice: M&G DuraVent warranty applies to this professional grade product only when installed by a trained professional installer. This FasNSeal 3 Inch x 4 Inch Tapered Increaser features a patented built in mechanical locking band and triple lipped directional gaskets which allows for ease of installation. Use to increase vent diameter. Creates a smooth transition for an undisruptive flow. Please contact customer service for custom sizing..Fea...