Metal–fab 3MIN4 3 Inch To 4 Inch No–height Type B Round Chimney Pipe Increaser

Product Features

• Allows connection of 3" and 4" pipe without adding undesirable height
• .018" galvanized steel outer wall and .012" aluminum alloy inner wall
• Double-wall design allows a 1" clearance to combustibles
• 1/4" insulating air space
• For use with Metal-Fab Type B Round Chimney Pipe
• SureLock locking system creates secure connections without tools
• Hemmed flue and casing eliminate sharp edges
• Compatible with other brands of UL Listed round gas vent pipe (see list below)
• Listed to UL 441
• Limited one-year warranty