Lock Top II Chimney Damper

The Lock-Top II damper has a specially designed chimney cap. It comes fully assembled and ready to install directly to the flue tile.

Includes 30' stainless steel cable, Sweep's Ring, adhesive, and mounting hardware. Lifetime warranty. Note: Do not use Lock-Top dampers with gas logs. Intended for use with traditional masonry wood burning fireplaces.

The included Sweep's Ring Gasket will make the removing of the damper quick and easy for chimney cleaning and inspection. The Sweep's Ring Gasket will attach to the flue with the adhesive (included with damper) and the damper will simply bolt to the gasket.

Sizing:

RS Round Flue Adapter (Optional):

Lock-Top Dampers are installed to your chimney flue, many of the flues are rectangle or square in shape and the dampers are easily attached to the chimney or clay tiles. However, many chimney flues have round clay tiles, pipes or solid packed Class A double wall pipes, we now have a solution for them - the RS round flue adapter.

Using the RS Adapter, simply slide it inside the round flue opening and attach the energy-saving Lock-Top damper to the square (top) of the RS adapter. Select the RS Adapter by the inside diameter of the flue or pipe opening. The RS adapters are NOT to be used with Air Cooled Pipes. Please contact us for a quote for Air Cooled Pipe Adapters. Give us a call, if you would like help sizing for a RS Adapter

The 6"-8" adapter plate size is 9 1/2" x 9 1/2". The 9''-12" adapter plate size is 12 1/2" x 12 1/2".

RS Round Flue Adapter Sizing:

Installation Instructions:

Lock Top II Chimney Damper Installation Instructional Video
Note: In order for the damper to close properly the cable must be inside the indented bar that holds the fusible link together. If the cable is outside the indented bar of the fusible link, the damper will not close properly. See example below.