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3M3 B-vent Round Pipe 3"x3'
Metal-Fab round B-Vent has been evaluated and listed by Under writers Laboratories, Inc., to mate with other specifically identified and UL listed round gas vent, in 3" through 6" diameters. Metal-Fab's approval covers connections at both the male (outlet) end, and the female (inlet) end to the following B-Vent products:
At the male (outlet) end of compatible gas vent, add an adapter or adjustable length (M6A,
M12A, or M18A) - then add sections of Metal-Fab pipe. At the female (inlet) end of
compatible vent simply insert the male end of Metal-Fab B-Vent into the compatible gas
vent and secure per instructions.