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
DLD 6 6″ $195.00
DLD 7 7″ $219.00
DLD 8 8″ $225.00
DLD 9 9″ $243.00
DLD10 10″ $255.00
DLD12 12″ $279.00

$11.95 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, call (919) 772-8110 or email 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.

  • Passing the Hat


    Karen and Carl Newton


    Sarah and Will Gilfillan

    Owning and operating Chimney Keepers for 27 years has been a very rewarding experience, and we have enjoyed the relationships we have built with our customers. We are now starting a new chapter and are selling the business to one of our Technicians. Though we will miss the many relationships and friendships we have built over the years, Karen and I are looking forward to traveling full time in our Airstream as we explore the nooks and crannies of North America.

    We would like to take this opportunity to introduce you to Will and Sarah Gilfillan, who will be taking over Chimney Keepers as of March 30, 2020. Rest assured, Will has been well trained (by Carl!) and is very competent, with nearly four years of experience in the gas log/fireplace/ chimney service industry and over ten years as a firefighter. Sarah, the Office Manager/wife is a fast learner, and will do wonders in assisting you with scheduling appointments and answering questions. It was important to us to find a good fit for our customers, and we feel confident that you will find Will and Sarah to be knowledgeable and a pleasure to work with.

    Thank you for your business over the years. It was my distinct pleasure to have been of service to you, and I wish you continued success and prosperity in the years to come.

    Sincerely, Karen and Carl Newton

  • Is Your Wood-burning or Gas-burning Fireplaces ready for Winter?

    Is your Fireplace or Gas Log unit ready to go? If not, or for a service, give us a call.

    During a power outage, a fireplace or gas log unit may be your only form of heat, so make sure they are working in top form. Give us a call to set up an appointment, 919-772-8110.

    PS: If you do NOT have a Carbon Monoxide detector and you have gas logs, GET ONE… NOW… We recommend the combination CO/Smoke, battery-powered, detectors found at Lowe’s, Home Depot, or most hardware stores.

    If yours are over 10 years old, replace them (there’s a date on back). If there is not a date of manufacture on the back, GET rid of it.

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