Do you have a broken, rusted,seized,or worn out original damper and want a cheap better alternative to having it replaced by a mason? The "Lock-Top" or "Lyemance" style dampers are the answer. Better then your original damper because they provide a seal at the top of the chimney stopping more energy loss, all pest infestations, and a chimney's worst enemy... water damage!

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Lyemance Dampers            Lock-Top Dampers 

Discount Chimney Supply Inc. (2011)