B Vent Increasers

Metal-Fab Type-B Gas Vent products are tested and listed to UL 441 for approved gas appliances and feature our innovative twist-lock connection and locking tab, eliminating the need for sheet metal screws. Metal-Fab Type B Gas Vent combines hemmed flues and casings that maximize product durability and reliability and minimize installation time. Designed for versatility, Metal-Fab Type-B Gas Vent products 3"-6" adapt to major competing brands and when installed establish a UL Listed connection.
Part # Item Name
075-0560 3"x5" Vent Increaser MIX
075-0655 3"x6" Vent Increaser
075-0656 4"x6" Vent Increaser MIX
075-0740 4"x7" Vent Increaser MIX
075-0741 5"x7" Vent Increaser MIX
075-0742 6"x7" Vent Increaser MIX
075-0840 5"x8" Vent Increaser MIX
075-0841 6"x8" Vent Increaser MIX
075-0842 7"x8" Vent Increaser MIX
075-1045 6"x10" Vent Increaser MIX
075-1047 8"x10" Vent Increaser MIX
075-1240 8"x12" Vent Increaser MIX
075-1241 10"x12" Vent Increaser MIX
075-1435 12"x14" Vent Increaser MIX