Top-mounted, Drop-In Liner Dampers, Chimney Pipe

spider_top_mount_damperThe ultimate replacement for warped, worn out, or defective factory-built fireplace dampers, and for use in most pre-fab, class A, round terra cotta and stainless steel chimneys. The drop-in liner damper is easy to open and close from inside the firebox. Made of heavy stainless steel construction.

  • Replaces missing, rusted or broken dampers
  • Installs approx. 6″ below top allowing existing cap to be reused
  • Prevents heat and air conditioning loss
  • Does not induce additional resistance or turbulence and is not affected by wind
  • The drop-in liner dampers can be used on:
    • Class “A” solid pack
    • Pre-fab fireplace
    • Single-wall round
    • Flexible flue liners
    • Air-insulated  and any pipe type chimney in size 6-16 inch round diameter.
How one look's inside a flue that is cut to show detail.

How one looks inside a flue that is cut to show detail.

Installation is simple, and damper is recessed approximately 6 inches below and inside the top of flue — ideal for restoration projects where an exposed damper is unwanted. The existing or new rain cover can be installed without fear of a freezing or sticking damper.

The top-mounted, drop-in liner damper is all 316-L stainless steel construction and will withstand repeated fires with no problems. It offers a spring-loaded damper that allows unlimited adjustment to open position of the damper.

Installation of drop-in liner dampers is usually about $55.00-75.00 (Raleigh, NC area only). Call Chimney Keepers at 919-772-8110 for more info.

Each damper kit comes with a 32-ft. stainless steel cable, stop spring, bracket, anchors, masonry drill bit, and cable attachment with chain handle.

Damper Kit

Damper Kit

Handle bracket attached to side of firebox. Use 1/4" masonry bit.

Handle bracket attached to side of firebox. Use 1/4″ masonry bit.

Item # Size Price Buy Now
DLD 6 6″ $185.00
DLD 7 7″ $209.00
DLD 8 8″ $215.00
DLD 9 9″ $233.00
DLD10 10″ $245.00
DLD12 12″ $269.00

$10.95 shipping on drop-in liner dampers in the U.S.! Extra shipping cost to Alaska and Hawaii of $6.95.

Other sizes are available. For more information, email carl(at) with the size you need and your zip code.

**For proper fit, measure the inside of the flue and get a damper that matches that number. The actual damper is smaller by 1/4- 1/2″ so it slides inside the flue.

If you have a 13″ or 15″ flue, adapters are available (special order – nonrefundable). Example: Your flue is 15″. You can order a 14″ damper with an adapter that will allow it to fit inside the 15″ liner. It’s not perfect but will work most of the time. Adapters are $125.00 each. They can be made up to 20″ in diameter.

You can install one yourself with simple hand tools and an electric or battery-operated drill. Complete instructions are in every box.

Note: These dampers are specifically designed for woodburning fireplace flues and should not be used on fireplaces with gas logs.  For regular rectangle or square dampers for masonry chimneys check out our LockTop Dampers.

  • Carl’s Corner

    Carl Newton: WolfPack Fan,
    Carolina Hurricanes Fan,
    Carolina Panthers Fan

    Winter is upon us this traces of snow some 20 days before Christmas so no telling how this one will go. The warm stuff seem to stay around for a while and it will get cold at some time.

    As we head into the holiday season we wish you all Happy Holidays, Merry Christmas and a Happy New Year.


    PS, If you have gotten a quote for chimney repairs, ie.. you need a chimney liner -liner work, parging smoke chamber etc. or you might burn your house down stuff, that seem HIGH give us a call and let see what we can do for you.

  • Woodburning and gas burning fireplaces. Are they ready for winter.

    Is your Fireplace or Gas Logs ready to go.. If not or for a service give us a call.

    In a power outage a fireplace or gas logs may be your only form of heat so make sure they are working in top form. Give us a call to set up appt 919-772-8110

    have a good week

    PS: if you do NOT have a Carbon Monoxide detector and you have gas logs.. GET ONE.. NOW... I recommend the combo CO / Smoke battery powered detectors at Lowe's Home depot or most hardware stores..

    If yours are over 10 yrs old replace it.. (there's a date on back) If there is not a date of manf on back GET rid of it.

  • Interesting Info/Links

    • Want to find out more about vacation rentals? Timeshare Resorts.
    • Own Timeshare and exchange with RCI? You need to read this info. IT'S IMPORTANT TO LEARN MORE.



    if you need a good photo resizer that works with batchs of images give this a try. Fotosizer - Freeware Batch Image and Photo resizing made easy