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    Selkirk DSP Double-Wall Black Stovepipe Masonry Adaptor - For Wood Burning Stoves

    List Price: $39.99
    Sale Price: $35.95
    You Save: $4.04 (10%)
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    • Allows DSP Stovepipe to be installed through a masonry chimney wall
    • For connecting directly to a masonry chimney or to a SuperPro lined chimney
    • .015" stainless steel inner liner with 26-gauge steel outer wall
    • 6" clearance from combustibles
    • Scratch-resistant black finish
    • Available in two diameters
    • Lifetime warranty
    • UL Listed


    • 6"
      • 6" inner diameter with 6.5" outer diameter
      • 11.75" H x 10" W
    See complete product details >>
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    Product Details
    Free Venting Design & Quote:
    Manufacturer: Selkirk
    Part Number: 7755-DSPMADAPT
    eFireplaceStore Item Number: CPF-7755-DSPMADAPT


    • Allows DSP Stovepipe to be installed through a masonry chimney wall
    • For connecting directly to a masonry chimney or to a SuperPro lined chimney
    • .015" stainless steel inner liner with 26-gauge steel outer wall
    • 6" clearance from combustibles
    • Scratch-resistant black finish
    • Available in two diameters
    • Lifetime warranty
    • UL Listed


    • 6"
      • 6" inner diameter with 6.5" outer diameter
      • 11.75" H x 10" W
    • 8"
      • 8" inner diameter with 8.5" outer diameter
      • 11.75" H x 12" W
    Vent installations each have their own unique style and needs, which is why Selkirk provides this adaptor that helps make ventillating your chimney much easier. With this connector, you can connect your stovepipe through a chimney wall with as little as 6 inches of clearance. This accessory is available both in 6 and 8 inches in order to accommodate your ventillation needs, and the scratch resistant black color allows it to blend in with most vent systems.
    Customer Questions & Answers
    By Ruth from duluth mn on October 28, 2011
    Can you attach a 6 " double wall stove pipe directly to this adaptor?

    By Kevin E. on October 31, 2011

    Yes. In fact, that is its prime objective. It is part of the Selkirk DSP Double-Wall line.

    By Andre from Billerica, MA on October 30, 2015
    I have a 6" pipe wood stove and a "square" clay thimble. The inside dimensions are 6-3/4" x 7". The builder must of used the same clay liner for the chimney and used a leftover piece for the thimble in the 1960's. Would it meet code standards to use this double wall stovepipe through the square thimble. I assume the outside diameter is less than 6-3/4"? What would I do with the space in between the pipe and the square thimble?
    By Will M. on November 2, 2015

    While we will be able to provide guidance that will meet NFPA 211 standard, this standard is only accepted as code if it is adopted by your local code enforcement agency. However, using the Copperfield Galvanized Stovepipe Masonry Chimney Thimble - 6-Inch Diameter along with Rutland Pre-Mixed Chimney Sweep High-Temp Furnace Cement - 16 Ounce Tub to close the remaining gap should be sufficient.

    By lee from Sutton, NH on August 25, 2012
    I have a wood stove with an 8" opening and an 8" ID masonary flue liner in a concrete block chimney. What can I use to get through the wall? I only have 14" clearnance to work with.
    By Collin C. - NFI Master Hearth Professional on August 27, 2012

    For safety, it will be necessary to use double-walled stovepipe up to the chimney thimble transition. Single-walled stovepipe requires 18" of clearance to combustibles and could not be used in this application.

    As for passing through the wall into your chimney, there are a couple of options for your needs. You may use a standard clay or metal thimble, then pass the double walled pipe through the thimble to be flush with the chimney liner. It is best to size the thimble as closely to the outside diameter of the pipe as possible, as this will cut down on any sealant that must be used between the pipe and thimble.

    You may also use an item such as this DSP product, which is made for this specific Selkirk line of pipe. Simpson makes a similar product for their DVL pipe as well.

    By Julia from Laconia, NH on May 23, 2016
    I was wondering, can this adapter can be used to connect a double wall stove pipe to a masonry chimney that has a clay liner?
    By Will M. on May 24, 2016

    Masonry adaptors like the product in question are intended to be used to connect listed double wall pipe to a masonry chimney that has been relined with flexible stainless chimney liner of the same manufacturer as the double wall stovepipe.

    By Allen from VA on July 9, 2013
    I have a New Englander wood burning stove with a 6" top flue collar. I intend to come out of the stove with a 12 inch single wall stove pipe, 90 it back to the wall. The wall is a 2x4 wall, the area behind the stove will be faced with cement board then manufactured stone. Where the 'thimble' passes through the wall, I have left a clear area of 16 inches in all direction, so in the framing there is a gap 32" square in all directions from the center where the thimble will pass through. On the exterior of this wall, a flue is being built. It is 16 x 16 flue block and will be lined with the clay flue liners. I'm using the liner and block that has the cut out for the thimble. The inside measurements of the block are about 8.6 x 8.6 inches. Where the exterior sheathing is in contact with the exterior flue, ( the outside of the wall that butts up to the flue block, I intend to cut out the sheathing, and line with heavy gauge flashing and cement backer board. So there will be a gap in the sheathing about 15.6 inches wide by 32 inches high. I have two questions. Does this adapter need to be placed INSIDE a clay or metal thimble, or can it be used as the thimble its self? The thickness of the entire pass through is 9-10 inches. You have a total of about 5 inches of flue block and clay liner, the 2x4 wall and about a inch of stone facing. I have not seen a over all length on this item, I may have missed it. Is this long enough to pass through the wall, and will my standard 6 inch single wall stove pipe attach to the end of this adapter, does it slide over the end or slip inside? Last thing, I know one would not use insulation with the 'kraft' paper cover, can you use just large chunks of un-papered insulation, around this adapter, to fully insulate this cavity in the wall?
    By Collin C. - NFI Master Hearth Professional on July 9, 2013

    This DSP masonry adapter could be used to make the transition to your clay chimney flue. It is not usually designed to be passed through a combustible wall by itself. A clay thimble would usually be used for that. However, the ample clearance that you will have to combustibles could theoretically make the installation possible.

    The overall length of the 11 3/4 inches. After speaking to the manufacturer, I have confirmed that while single wall pipe can be adapted to this masonry adapter, it is not listed to do so. As such, it may not pass inspection. The safer route would be to use the DSP product, beginning at the stove.

    Otherwise, your installation has plenty of clearance to combustibles. Unfaced fiberglass insulation can be used around the adapter as it passed into the chimney. It is also not a bad idea to mortar the end of the adapter in position, as it will prevent the possibility of movement or separation.

    By Walt from PA on January 14, 2014
    I have a terracotta thimble in a masonry fireplace. The thimble is 21.5" long. Am I okay with the adapter only being 12" long and not the whole way through the thimble?
    By Collin C. - NFI Master Hearth Professional on January 15, 2014

    As long as the terracotta thimble is in good condition for the entire length, it will not be an issue for the adapter to terminate short of the end of the thimble. It is recommended to seal around the adapter on the inside of the home with furnace cement to prevent smoke backpuffing.

    By Sharon from Dayton, OH on December 3, 2014
    I need this item, but I also need a 8" x 6" reducer because my stove is 8" but the vent hole is 6". Do you carry this product?

    By Chris C. on December 4, 2014

    We do indeed carry the 8" to 6" reducer that matches with the Selkirk DSP masonry adapter. Please view this reducer here.

    By Daniel from Vernal Utah on January 25, 2012
    A masonry chimney is on the other side of the 2x6 exterior wall with only about 2" between them. How should the stove pipe go through the wall and connect to the masonry chimney?
    By Kevin E. - Fireplace Specialist on January 25, 2012

    This adaptor is designed to be the bridge between the stove pipe in your room and an existing masonry chimney or a relined masonry chimney. If your masonry chimney is lined, a length of stove pipe connects to the short side of this adaptor and the long side pushes through the brickwork to connect to a reline tee within the masonry chimney. If no relining components are being used and the masonry is in good condition and can support the draft of your stove, this adaptor is pushed through the brickwork and into your existing flue. Instead of connecting to a reline pipe via a tee, the adaptor is installed to sit just flush with the inside wall of the masonry flue.

    By Rod from Jackson NJ on January 13, 2013
    The back of my stove has a pipe connection that is 6" ID with a 6 1/2" OD (pipe is 1/4" thick). What size vent pipe do I need 6" or larger?
    By Collin C. - NFI Master Hearth Professional on January 14, 2013

    It is common for 6 inch stoves to have an outer flue collar measurement of 6 1/2 to 6 3/4 inches. You can use standard 6 inch single wall or 6 inch double wall stovepipe. The outer wall of the double wall piping will fit over the outside edges of the flue collar and give a finished appearance.

    By Davey from Nova Scotia on November 19, 2012
    I'm installing 6" DSP which needs to connect with a masonry chimney that has a 7" ID metal thimble. Is there an adapter for this size?
    By Collin C. - NFI Master Hearth Professional on November 20, 2012

    Unfortunately, there is not an adapter to take up the gap between the DSP stovepipe and your 7 inch thimble. Once the masonry adaptor has been fully slid into position, it would be necessary to seal the gap using a rope gasket or a refractory mortar.

    By Mike from MI on December 8, 2015
    Whats the difference in using this Selkirk DSP double-wall black stovepipe masonry adaptor vs a wall thimble?
    By eFireplaceStore on December 8, 2015

    This part essentially takes the place of a thimble in a masonry application. The part is not insulated for use through a combustible wall however.

    By Mike from Maine on September 22, 2014
    I'd like to use this product to pass through a brick faced wall into a masonry chimney behind the wall. I have two questions:

    1. the pipe from my stove is 26 ga single wall, will that connect to the front of this adapter?
    2. the distance from the brick wall to the chimney is 15 inches, can I extend the back of this adapter with DSP to make up the 4 inches I'm short?
    By eFireplaceStore on September 23, 2014

    This adapter can indeed be connected to 22-26 gauge single wall pipe, although the air space between the inner and outer walls on the adapter will be exposed.

    Unfortunately, DSP does not connect to the back side of the adapter to extend it any further.

    By Rob Ward from 17972 on November 12, 2011
    Hello, I have a 7" ID clay thimble surrounded by about 8" of brick, It's my understanding that the brick should have been 12" clearance all around the thimble. Could I use this piece of double wall stovepipe masonry adaptor instead of tearing my wall apart to try to extend the brick from 8" to 12"?
    The depth from the face of the thimble to the inside off the chimney is 12"'
    By Kevin E. - Fireplace Specialist on November 14, 2011

    This adaptor is designed for use with our Selkirk DSP Double-Wall stove pipe. This Double-Wall pipe only requires a 6" clearance to combustibles. As such, your 8" of brick would be sufficient. However, if you are intending to use Single-Wall pipe, 18" of clearance to combustibles must be maintained.

    By Mike from New York, NY on May 31, 2013
    How do you secure this stove masonry adaptor (6') to a 8" square clay pipe? Do you use furnace cement? If so, is the attached collar is in the way when applying the furnace cement?
    By Kevin E. - Fireplace Specialist on May 31, 2013

    Indeed, furnace cement is suitable for this application. To install, the adapter would be placed partly into the hole prepared in the clay pipe (leaving room to work behind the collar). A bead of cement would be applied onto the adapter just behind the collar. When the collar is pressed fully into the clay pipe, the cement will seal the gap between the adapter and the clay.

    By Rip from Ardmore, TN on December 22, 2014
    I have a masonry chimney with a 6 inch ceramic thimble that has broken. The broken thimble is 6 inches x 18 inches. Can I use this product to replace the ceramic thimble or do I really need to replace the broken thimble with another ceramic thimble? I plan to use 24 gauge single wall stove pipe. Once the new thimble is in place.
    By eFireplaceStore on December 23, 2014

    This product is made specifically to pass the DSP double wall stovepipe system into a masonry chimney. As such, you would not be able to use a single wall system if this is installed. If the chimney is fully masonry with no combustible framing, a product such as the Copperfield Galvanized Stovepipe Masonry Chimney Thimble - 6-Inch Diameter could be used. The product is only 12 inches long, so a pair of them would need to be used for your application, with the second being cut down to 6 inches.

    By Randy from Edinboro, PA on May 3, 2017
    I found that single wall pipe fits extremely loose. Is there some transition adapter available for this use? My application requires that an elbow be incorporated very close to this masonry adapter. Any suggestions other than securing single wall pipe with screws?
    By Will M. on May 3, 2017

    The reason this adapter does not provide a secure fit is because this part should only be used with Selkirk DSP double wall stovepipe of the same diameter. This stovepipe may be viewed by selecting your diameter and Selkirk from the filters along the left-hand side of the page in this product category.

    By Brian from Seymour on June 12, 2014
    I have a masonry flue that has a clay connector pipe coming through a block wall. What can I use to connect to the masonry flue and safely come through the wall and connect to my wood burning stove?
    By eFireplaceStore on June 12, 2014

    The DSP adaptor you are viewing now is intended specifically for this purpose. The adaptor is designed to pass through a clay thimble into a properly lined masonry chimney. You can then connect DSP double wall stove piping between the stove and the adaptor. Keep in mind that the even with the adaptor, a 6 inch apron of noncombustible material must encircle the pipe as it passes through the thimble. Cement board can be used for this purpose.

    By Jason from Colchester, CT on June 4, 2013
    I have a fire clay thimble that has a inner diameter of 6" and an outer diameter of 7.5". Would this product fit through my thimble?
    By Collin C. - NFI Master Hearth Professional on June 5, 2013

    For the 6 inch variant, this adapter has an outer diameter of 6 1/2 inches. As such, the clay thimble that is present now is too small and would only be able to accommodate a single wall, 6 inch chimney connector. If you would like to use the double wall connector, the thimble would need to be be broken up and removed.

    By Jed from Twin Cities, MN on September 19, 2013
    Would item # CPF-7755-DSPMADAPT connect to a 6" Dura-Vent DVL stove pipe made by Simpson?
    By Collin C. - NFI Master Hearth Professional on September 19, 2013

    Unfortunately it would not. DSP and DVL use two different attachment methods and have different outside diameters. Duravent does make a similar product for passing DVL through a masonry chimney and into a chimney. This item is the DuraVent DuraLiner Masonry Thimble with Slip Connector for Dura liner 6 inch Pipe. This item can also be used to connect DVL to Simpson's Duraliner system.

    By John C from St. Johns, MI on October 17, 2012
    I have a question as to your adaptor. I have the adaptor inserted to the chimney. Now I go to connect the double wall stove pipe and everything is backwards as to installation. The arrows for stove pipe go the opposite way as to connection to the adaptor. Can this be reversed or what am I doing wrong?
    By Collin C. - NFI Master Hearth Professional on October 17, 2012

    Per the manufacturer, the DSP line must be assembled with the male end up on the outer pipe wall. If not, the piping will need to be reversed for the connection to be correct.

    By Aaron from Duluth, MN on February 5, 2015
    I just purchased the Selkirk DSP double-wall black stovepipe masonry adapter. Does there need to be a ceramic wool between this and the clay thimble? Is there another type of wool that can be used?
    By eFireplaceStore on February 5, 2015

    The DSP masonry adapter is designed to be used without insulation between the outer wall and the clay thimble, however if there is additional space that needs to be taken up or if you would like to insulate better, standard fiberglass insulation with no paper facing can be packed between the two.

    Customer Reviews
    Selkirk DSP Double-Wall Black Stovepipe Masonry Adaptor - For Wood Burning Stoves ( 35.95 )
    5 out of 5 Stars based on 3 review(s) - sorted by Most Helpful Customer Reviews

    excellent 5 star
    from RICHFIELDon
    December 30, 2015
    I would recommend this item to a friend.
    fit perfectly

    from Davis, WVon
    December 4, 2015
    I would recommend this item to a friend.
    I was very pleased w/ this pipe adapter. i didn't want to make my entire pipe double wall b/c of heat loss and cost so i got this adapter to fit inside of my chimney thimble and was able to connect the single wall corner directly into it. have been burning a fire for weeks now and no problems; often feel around it and the other wall protection and find nothing warm to the touch!

    Good product
    from PAon
    November 26, 2011
    I would recommend this item to a friend.
    Exactly as advertised. I reviewed several websites before finding the best price here.
    double wall stove pipe stays remarkably cool on the outer surface.


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