18-12DM 18" Length Snap Lock Double Wall Wood Burning 12DM Series Pipe F0933

Each double wall chimney section consists of a 15" diameter galvanized outer pipe, a 12-3/8" diameter stainless steel inner flue pipe and a wire spacer.
Actual lengths gained after fitting overlaps must be taken into consideration (lineal gain)
Lineal gain is the actual measurable length of a part after two or more parts are connected.

For the fireplace brands listed Comfort Glow, Comfort Flame, Desa, Design Dynamics, FMI, Vanguard, Vantage Hearth, Superior, IHP, Astria

18-12DM 18" Length Double Wall Pipe (Gain 16-5/8")

Snap-lock Sizes Available: (15" Diameter Galvanized Outer Pipe, 12-3/8" Diameter Stainless Inner Pipe)

IN STOCK