Inner and outer pipe. The outer pipe, made of galvanized steel, provides cooling air necessary to maintain safe chimney temperatures, while the inner pipe, made of stainless steel, emits gases out of the fireplace. Snap- lock design. 12" standard pipe (12" inner diameter, 15 3/8" outer diameter) UL127 Listed 1700 Degree Pipe.
Type HT chimney pipe special augured in mineral wool insulation filling the space between stainless steel walls is only 1 inch thick, yet provides 17 times the insulating valve of brick. This optimum density of insulation stops expansion noises and resists and contains surges of heat. This allows the system to be enclosed with only 2 inch clearance to combustibles. The "solid pack" density comprises about 85 percent air. The mixture of extremely fine fibers trap this air in the pores of the insulation and also blocks radiation heat transfer. Tested to 2100 degrees F. UL listed.
Pipe sections combine corrosion-resistant stainless steel and sturdy galvanized steel for strong chimney construction. Lightweight pipe with snap-lock joints offers faster, easier installations. Features a space-age refractory blanket between the stainless steel/galvanized walls to withstand intermittent temperatures up to 2100 degrees F. as called for in UL 103 HT Standard. Requires 2" air space to combustibles.
For installation to a masonry chimney through a combustible wall. Used to connect a single or double wall stove pipe to an existing masonry chimney or a relined masonry chimney with stainless steel liner.