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Lock-Top II 17' x 17' Chimney Cap/damper 3/4'

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$456.99

$ 99 .00 $99.00

In Stock
  • Energy Saving: Silicone Rubber Seals Chimney Tight, No Air & Water Leaks.
  • Premium Quality Damper, Made in the USA.
  • Includes: Sweeps Ring, silicone sealant, 30' stainless steel cable, and hardware set. Arrives Fully Assembled.
  • Warranty: Manufacturers Lifetime Warranty.
  • Material: Stainless steel and cast-aluminum construction, with silicone rubber gasket.


The Lock-Top II combines the energy-saving features of the Lock-Top Damper with a special Gelco chimney cap, offering unparalleled results in saving money, time and frustration in chimney energy conservation. It is designed to seal the chimney and keep bad weather, pests, and unconditioned air outside, keeping clean conditioned air inside.The Lock-Top II comes fully assembled. Its base mounts to the included sweep's ring which attaches to the flue tile with silicone sealant (included). A 30' stainless steel cable (included) drops down the flue and a hardware set mounts in the firebox. All Lock-Top II cap/dampers have an overall height of 11-3/8" and 3/4" mesh. Size: 17" W x 17" L x 11-3/8" H. Fits Inside Flue Sizes: 14" x 14" to 17-1/2" x 17-1/2". Cross-Sectional Area: 225" Sq. Mesh Size: 3/4". Note: Don't use Lock-Top dampers with gas logs - failure to open could cause carbon monoxide to back up into the house. In case of a gas leak, gas could be trapped in the flue, resulting in an explosion. Features: Stainless steel and cast-aluminum construction. Lifetime Warranty. Silicone rubber seals tight.


nancy b
Reviewed in the United States on March 6, 2024
So far, the damper/cap has worked very well. I had it professionally installed with good results. It’s sturdy and USA made. However, the Unlimited Warranty card I mailed to maker, in Iowa, was returned as undeliverable. When I went to maker’s “contact us” web site, I utilized their “send us an email” option to request an address to submit warranty card. They never returned the correspondence-so, no warranty protection. And, although the company quickly resolved the issue, I was initially sent a telescoping stove pipe instead of the damper/cap I ordered. A good product, fairly pricey because of the size I required - and no warranty record, in the event one might be needed. Still, product is a great solution to an open hearth fireplace that had its original damaged damper removed.