Relining pipe that is manufactured for the purpose of venting wood, coal, wood pellet, oil, or high-efficiency gas appliances is always made of stainless steel. The thickness of the steel depends on the brand of relining pipe. The alloy of the steel depends on the application. Wood and wood pellet appliances are generally served by 316 Ti or 304-alloy stainless steel pipe. Coal and oil appliances require 316-alloy stainless steel relining pipe because it is more resistant to the kind of corrosion caused by those fuels. High-efficiency gas appliances are best relined with AL 29-4C alloy relining pipe. This alloy is highly resistant to corrosion. High-efficiency gas appliances emit a more corrosive flue gas due to the high quantity of moisture in the flue gases.
Stainless steel pipe, either rigid or flexible, made for relining flues of masonry chimneys when the original clay liner has cracked or broken. May also be used to create a lining in a masonry chimney that was made without a clay liner.
Protective coverings for chimneys usually made of aluminum, galvanized or stainless steel, or copper. Most chimney caps have a mesh screening that serves the dual purpose of spark arrestor and barrier against animals. Chimney caps also prevent rain from entering the flue of the chimney.
A device installed at the top of a chimney for the purpose of sealing the flue shut when the fireplace is not in use. They are often used as replacements for throat dampers that are installed just above the firebox when a masonry chimney is built. Lyemance and Lock-Top top-sealing dampers are as much as 90% more efficient than throat dampers because they provide a silicone rubber gasket seal rather than metal to metal.