Lock Top II Chimney Damper
Lock Top II Chimney Damper
SKU:RLTII88
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The Lock Top II Chimney Damper With Cap is the perfect solution for cold & drafty wood burning fireplaces. There's no question, old traditional metal fireplace throat dampers tend to be very leaky even when the damper is closed.
Save money by installing the Lock Top Chimney Damper. As a matter of fact, a traditional masonry fireplace throat damper will leak $200 or more of energy a year. However, the Lock Top II Chimney Damper is equipped with a silicone gasket under the lid which makes for an extremely tight seal when closed. After installation, you will no longer feel a draft when the fireplace is not being used.
Features
Not only will this damper prevent downdrafts and energy loss, it is also equipped with a single flue chimney cap with 3/4" spark arrestor to prevent sparks from exiting the chimney while also providing weather protection. The cap will also prevent critters from entering the chimney if you forget to close the damper after you have had a fire. The cap is removable from the damper for cleaning and maintenance.
A Sweep's Ring is included with the Lock Top II Damper Cap. Specifically, the Sweep's Ring allows you to fully remove the damper without having to cut the adhesive that holds the damper to the flue. The Sweep's Ring Gasket will attach to the flue with the included adhesive. Lastly, the damper will bolt to the Sweep's Ring gasket.
Moreover, the Lock Top II Chimney Damper includes 30 ft. cable, adhesive, mounting hardware, and a Lifetime Warranty. The heavy duty stainless steel cable withstands extreme temperatures, it will not burn out. The base is constructed of heavy duty cast aluminum and the lid from stainless steel.
Overall, the hardware you will need to install the Lock Top II Damper is included. For that reason, the only tools you will need to install the damper are a pair of wire cutters, drill, 1/4" masonry drill bit, and a hammer.
- Removable lid
- 3/4" spark arrestor
- 30 ft. stainless steel cable
- Mounting hardware
- Sweep's Ring
- Adhesive
- Lifetime Warranty
Operating Your Lock Top Chimney Damper
Firstly, mount the Lock Top II Chimney Damper on the top of your chimney flue. Secondly, adjust the chain handle to the bracket you mount on the fireplace wall. Lastly, lock the cable in the fireplace bracket when you want to close the damper and release the cable from the bracket to allow the damper to spring open when you are ready to have a fire.
Most important, this is intended for use with traditional masonry wood burning fireplaces. In addition, do not use with gas appliances or gas logs.
Note: Do not use Lock-Top II dampers with gas logs (failure to open the damper for gas burning appliances could result in carbon monoxide to back up in the home. Also, in the event of a gas leak, could result in gas being trapped in the chimney which could result in an explosion.)
Lock Top Chimney Damper Sizing:
Firstly, measure the inside of the masonry chimney opening or clay flue. Secondly, compare your measurements to the chart below to find the damper size that will fit.
| Size | Fits Inside Flue Sizes |
|---|---|
| 8" x 8" | 6" to 9" Width x 6" to 9" Length |
| 8" x 13" | 6" to 9 1/2" Width x 9" to 12 1/2" Length |
| 8" x 17" | 6" to 9" Width x 14" to 17 1/2" Length |
| 13" x 13" | 9" to 12 1/2" Width x 9" to 12 1/2" Length |
| 13" x 17" | 9" to 12 1/2" Width x 14" to 17 1/2" Length |
| 17" x 17" | 14" to 17 1/2" Width x 14" to 17 1/2" Length |
Options for Your Lock Top Chimney Damper
RS Round Flue Adapter (Optional):
Although Lock-Top Dampers are typically installed to your square or rectangle flue, many chimney flues have round clay tiles, pipes, or solid packed Class A double wall pipes. We now have a solution for them with the RS round flue adapter.
Firstly, use the RS Round Adapter by simply sliding it inside the round flue opening. Secondly, you will attach the energy-saving Lock-Top damper to the square (top) of the RS adapter.
RS Round Flue Adapter Sizing:
To begin with, select the RS Adapter by the inside diameter of the flue or pipe opening. Another key point, the RS adapters are NOT to be used with Air Cooled Pipes. If you need an Air Cooled Adapter, please contact us for a quote.
Nevertheless, give us a call if you would like help sizing for a RS Adapter.
| Size Lock-Top Required | RS Adapter Size (fits inside dimension of pipe) | RS Plate Size |
|---|---|---|
| 8" x 8" | 6" Adapter | 9 1/2" x 9 1/2" |
| 8" x 8" | 7" Adapter | 9 1/2" x 9 1/2" |
| 8" x 8" | 8" Adapter | 9 1/2" x 9 1/2" |
| 13" x 13" | 9" Adapter | 12 1/2" x 12 1/2" |
| 13" x 13" | 10" Adapter | 12 1/2" x 12 1/2" |
| 13" x 13" | 11" Adapter | 12 1/2" x 12 1/2" |
| 13" x 13" | 12" Adapter | 12 1/2" x 12 1/2" |
At Chimney Cricket,
We believe in providing top-quality hearth and chimney products that combine durability, efficiency, and style.
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Whether you’re upgrading your fireplace, maintaining your chimney, or enhancing your outdoor grill setup, we offer industry-leading solutions trusted by professionals and homeowners alike.
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✅ Superior Craftsmanship
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FAQ
Frequently Asked Questions
Q: How do I choose the right chimney cap size?
A: Measure the outside dimensions of your flue and select a cap that fits securely. Our product descriptions include detailed sizing charts for easy selection.
Q: Are your fireplace grates compatible with all fireplaces?
A: We offer a variety of sizes and materials to fit masonry and prefab fireplaces. Check our product specs for details.
Q: Do you offer installation guides?
A: Yes! Many of our products come with step-by-step instructions, and we provide expert tips in our blog to help with installation and maintenance.
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At Chimney Cricket, we stand behind every product we sell. With fast shipping, top-rated customer support, and premium quality products, you can trust us to enhance your home’s warmth and efficiency. Explore our selection today and experience the Chimney Cricket difference!