4PWB - Biomass / Pellet Wall Bracket - 4"Biomass Products Catalog Metal Fab 4PWB Biomass Pellet Wall Bracket 4" Used to provide lateral support while maintaining proper clearance. Recommended spacing is 6ft between bands above the starting point. For use with biomass fuels such as pellet, corn, wheat or other grassy and woody plants as specified by appliance manufacturers. Features Type L Biomass Chimney 3" Clearance to combustibles Tested and Listed to UL 641. Pipe and fittings available in
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