8'' Insul-Flue Thimble Only

8" Insul-Flue Insulated Thimble - Use this thimble when you need to pass through a combustible wall and into a masonry chimney. This unit is sold in two parts, the Thimble Cover Assembly and the thimble itself. You need one thimble cover assembly per installation. The thimble cover assembly protrudes 13" into the room. The number of thimbles you need depends on the thickness of the combustible wall. The 8" long thimble is designed to pass through a wall with maximum thickness of 7". You can add an additional 8" by cementing two thimbles together with Rutland Stove and Gasket Cement, so you can pass through walls clear up to 15" thick. Or you can cut the thimble down with a hacksaw for thinner walls. The Insul-Flue Thimble requires a 15" or 17" square opening for use with 6" diameter or 8" diameter pipe, respectively. Complete installation instructions accompany each unit. Note; When ordering make sure to order both the thimble and the thimble cover assembly for a complete installation. Picture represents complete thimble.