Superior 8DM 8-Inch Inner Diameter Standard Chimney Venting Pipe for IHP/Superior Woodburning Fireplaces - 12 Inch Length

Chimney pipes such as this 8DM are identified by the inside diameter.  This particular pipe has an 8-inch inside diameter and a 12-3/8-inch outside diameter.

The 12s-8DM section has strapping installed on the vent component that attaches to framing for additional support for very tall chimneys (over 30 foot). 

No, this pipe requires at least 1" air space all the way around it.  You can use a firestop spacer or a firestop thimble.

The inside diameter of this pipe is 8 inches, so, no, another 8-inch pipe will not be able to go through the inside.

They twist lock together once aligned. You can try some liquid dish soap for lubrication, if needed.

This is double walled chimney pipe with an 8" inner diameter and a 12 3/8" outer diameter.

This chimney section would not be compatible, however, we still offer the SK series chimney your fireplace was listed for use with. A 12" section may be found here.

Usually penetration right at the ridge of the roof is avoided if it can be, by using 30 degree offsets to penetrate just to the side (12"-24" from) of the ridge. Majestic only produces that pipe in limited runs a few times a year. We try to keep that in stock as we can. Currently we do have a good supply. Building a stone chase down the road is a very good idea for looks and additional protection from the elements.

Unfortunately, no. The reason is because the chimney should be enclosed in an insulated chimney surround once more than 4 or so feet of chimney will be exposed above a roof. Air cooled chimney used with factory built wood fireplaces will offer no insulation itself to keep flue gases warm, which differs from class A chimney used with wood stoves. This type of chimney will have a solid layer of insulation between the inner and secondary wall and longer runs above the roof may be exposed in moderate climates, which is why a roof brace kit will be available. That being said, it appears as though you are in Massachusetts and even a lengthy run of exposed solid-insulated class A chimney would not be recommended.

Yes, 8DM pipe from Superior is the correct item for the WRT2036.

These chimney sections attach with lances and hems. When connecting the chimney directly to the fireplace, the inner flue pipe section must be installed first with the lanced side up. The outer pipe section can then be installed over the inner flue pipe section with the hemmed end up. While not necessary to add screws, I recommend using 3 screws around the outer section at each chimney connection for added security.

For the FMI 8DM and 8HT piping, the small lances on the inner 8 inch pipe will be facing upward at each connection, while the small lances on the outer 12 1/2 inch pipe will be facing downward at each connection. As such, this will put the hemmed end on the inner pipe facing downward and the hemmed end on the outer pipe facing upward.