Overview
The Lock-Top II is a top-sealing chimney damper and chimney cap in one, for masonry fireplaces. It mounts on top of the flue tile, and a stainless cable runs down to a handle inside the fireplace. Close it and the gasketed lid seals the top of the chimney, keeping warm air in and cold drafts, rain and animals out. Open it and the built-in 3/4" mesh screen works as a spark arrestor and cap. It's the standard fix for a rusted or broken throat damper. Buy from StoveSource and pay no sales tax in any state.
Sizes and part numbers
| Flue tile size | Part number | Price |
|---|---|---|
| 8" x 8" | DLTP88 | $344.99 |
| 8" x 13" | DLTP813 | $411.99 |
| 8" x 17" | DLTP817 | $493.99 |
| 13" x 13" | DLTP1313 | $448.99 |
| 13" x 17" | DLTP1317 | $440.99 |
| 17" x 17" | DLTP1717 | $529.99 |
The size is the flue tile's outside dimensions at the top of the chimney. See how to measure for a chimney cap.
Specifications
- Brand: Lock-Top II
- Type: top-sealing damper with cap
- Mesh: 3/4" spark arrestor screen
- Operation: cable and handle mounted in the firebox
- Use: open masonry wood-burning fireplaces with clay flue tile
Have a wood stove or insert? They have their own damper and need a liner, not a top-sealing damper — see chimney liner kits. Also consider the Energy Top damper, or a plain stainless chimney cap if you don't need a damper. Browse all chimney caps.
Why buy from StoveSource: Authorized dealer · No Sales Tax · Free shipping over $300 · Email or text 1-888-866-8206
Shipping & Returns
Free shipping on orders over $300 · ships in 1–3 business days.
Free shipping on orders over $300 to the continental US; a flat $24.95 shipping fee applies to orders under $300. Accessories and parts ship by parcel carrier (UPS, FedEx, or USPS), typically in 1–3 business days.
Returns. Unused, uninstalled items in original packaging can be returned within 30 days, subject to a 15% restocking fee.
Sold by StoveSource (authorized dealer). Ships directly from the brand's authorized distributor warehouse — see our Authorized Dealer page.