The best wood stove pipe plug depends on the opening’s diameter and whether you need a cap for a tee, an unused pipe end, or a larger wall flue opening. The five options below include fixed-size plugs for 6-inch and 8-inch pipe and adjustable covers listed for 4-inch to 8-inch openings. Check the product’s stated fit and your pipe type before choosing; these parts are not interchangeable simply because they look similar.
| Product | Best For | Stated Fit |
|---|---|---|
| Replacement BM0153 8-inch Stove Pipe | An 8-inch single-wall pipe end or tee bottom | 8-inch diameter |
| Irnyso Adjustable Flue Hole Cover | A flue opening that needs an adjustable cover | 4 to 8 inches |
| Irnyso BM0029 Metal Flue Cap | Closing a 6-inch single-wall tee | 6-inch inside diameter |
| Replacement BM0151 6-inch Plug Cap | A fixed-size 6-inch pipe application | 6 inches |
| 6719900 Adjustable Flue Hole Cover | A 4- to 8-inch wall flue opening | 4 to 8 inches |
Replacement BM0153 8-Inch Stove Pipe
This replacement BM0153 is an 8-inch black stove pipe piece with a crimped inner lip. Its listed design is intended to fit over the plain end of 8-inch single-wall black stove pipe. The product information also identifies it for sealing the bottom of a tee fitting for clean-out access or closing an unused stove pipe end.
Best for: Buyers who have confirmed that they need an 8-inch plug for compatible single-wall pipe. The stated diameter and crimped design make this the clearest fixed-size option in this selection for an 8-inch pipe or tee opening.
Its listed uses include wood-burning stoves, indoor fireplaces, and wood-fired cook stoves. The product description says it can help keep rain, leaves, debris, and pests out of a flue. Those claims do not establish that it can replace a required chimney termination or another component specified for a particular installation.
Check before buying: The product is described for single-wall pipe. Avoid choosing it solely by nominal diameter if your pipe type, end shape, or installation calls for a different part.
Irnyso Adjustable 4- To 8-Inch Flue Cover
This metal black flue hole cover is listed as a replacement for models 6719900, BM0026, and BM0353. Its stated fit range is a flue hole measuring 4 to 8 inches, making it a flexible option for an opening within that range rather than a plug designated for one pipe diameter.
Best for: Buyers seeking an adjustable cover for a flue opening and whose measured opening falls between 4 and 8 inches. It may suit someone who does not need a fixed 6-inch or 8-inch pipe cap, provided the cover’s fit and intended application match the installation.
The listing identifies the item as a replacement stove pipe flue hole cover. It does not provide detailed installation instructions or explain the adjustment mechanism in the supplied product information.
Check before buying: Confirm the opening measurement and replacement-model match. A stated range alone does not show whether a cover is designed for a tee clean-out, an unused pipe end, or a wall opening in your specific setup.
Irnyso BM0029 6-Inch Tee Cap
This metal flue cover is described as an indoor chimney pipe cap and round stove pipe plug. The listing says it closes one end of an assembled tee and supports cleaning and inspection. It is specified for a single-wall black tee joint, with a 6-inch inside diameter and a listed height of 2 inches.
Best for: Buyers looking for a 6-inch cap specifically for the open end of an assembled single-wall black tee. Its stated clean-out and inspection use makes it more directly suited to that role than a broadly described adjustable flue cover.
The key comparison point is the 6-inch inside diameter: choose it only when that measurement and the tee configuration match your system. The product information does not list a broader size range or describe use with other pipe types.
Check before buying: Avoid this option if you need an 8-inch cap or an adjustable wall-opening cover. Verify the tee’s dimensions and connection style rather than relying on the BM0029 model name alone.
Replacement BM0151 6-Inch Plug Cap
The BM0151 replacement plug cap is listed as black and 6 inches in size. Its product information also gives model number BM0151 and reference number 6527618. Compared with the more fully described BM0029, this listing provides fewer details about the part’s construction and intended installation.
Best for: Buyers who have already identified BM0151 or reference 6527618 as the needed part and need a 6-inch black plug cap. The stated model and size can help narrow a replacement search when those identifiers match the existing component.
This product may be a better choice than an adjustable cover when a fixed-size replacement is required. However, the supplied features do not specify a pipe type, crimped edge, tee application, material gauge, or detailed dimensions beyond the 6-inch size.
Check before buying: Confirm the BM0151 identifier and fit with the existing part. If you are selecting a cap without an established model match, compare the product’s full specifications with the opening before ordering.
6719900 Adjustable Chimney Flue Cover
This adjustable chimney flue hole cover is listed under model numbers 6719900, BM0026, and BM0353. It fits stated flue pipe holes from 4 to 8 inches and is described as adjustable for 5-, 6-, 7-, and 8-inch chimney wall openings. The listing identifies steel as its material.
Best for: Buyers who need a steel cover for a wall flue opening in the listed size range, especially when they want a product identified for several opening sizes. Its named replacement models provide an additional way to compare it with an existing cover.
The product description calls the steel sturdy and durable and says it is intended to protect the flue. The supplied details do not specify exact installation steps, the adjustment range at every size, or a use for closing a tee clean-out.
Check before buying: Measure the opening and confirm that it is a wall flue application. Do not assume that an adjustable wall cover performs the same job as a fixed cap on a stove pipe tee.
Buying Guide: How to Choose a Wood Stove Pipe Plug
Start by identifying the part you need to close. A pipe-end cap, a tee clean-out cap, and a cover for a flue opening are different applications. Product listings may use overlapping terms such as “plug,” “cap,” and “flue cover,” so compare the stated use and dimensions rather than relying on the title alone.
What size plug should you buy?
Measure the opening or the part the cap must fit, and check whether the listing gives an inside diameter, outside diameter, or a general nominal size. The BM0029 listing gives a 6-inch inside diameter, while the BM0153 and BM0151 are listed as 8 inches and 6 inches respectively. Do not assume that all measurements in product listings describe the same edge or fitting surface.
An adjustable cover may offer more size flexibility, but it is not automatically a better fit. The 6719900-style covers are listed for openings from 4 to 8 inches. Check whether the particular opening size and installation type are explicitly supported by the product information.
Is the cap for a tee or a flue opening?
For a tee clean-out, look for product details that specifically mention closing the open end of a tee or enabling cleaning and inspection. The Irnyso BM0029 listing identifies a single-wall black tee joint and an assembled tee. The BM0153 listing also identifies the bottom of a tee as one possible use.
A flue hole cover is a different category. The two adjustable covers here are described for flue holes or chimney wall openings. Match that description to the part of your system you intend to cover; do not select a wall cover simply because its size range includes your pipe diameter.
Does pipe type matter?
Yes. The supplied product details name single-wall black pipe for the BM0153 and single-wall black tee joint for the BM0029. The other listings describe flue-hole covers or give limited application details. If your installation uses a different pipe construction, confirm that the proposed part is specified for it before purchasing.
Also inspect the opening and existing connection. A crimped edge, a specific tee design, or a model-number match may affect fit. Product data that omits those details is a reason to verify compatibility rather than guess.
When should you choose an adjustable cover?
Choose an adjustable cover when its intended application is a flue opening and your measured opening is within its stated range. The 6719900 listing names steel and several replacement model numbers. The Irnyso adjustable listing also names 6719900, BM0026, and BM0353 and gives a 4- to 8-inch range.
Compare exact model references, material information, and the opening range. The two adjustable listings overlap in their stated replacement models, but their descriptions do not provide identical details. Read the specifications for the specific item you plan to order.
What should you verify before installation?
- Measure the opening and compare it with the listed size or range.
- Confirm whether the part is intended for a pipe end, tee clean-out, or wall flue opening.
- Check listed pipe type, model number, and replacement references against your existing component.
- Follow the installation requirements for your stove and venting system; a plug should not replace a required system component.
- If the listing does not establish fit or intended use, obtain clarification before relying on the part.
Frequently Asked Questions
Can I use a 6-inch plug on an 8-inch stove pipe?
No. The listed 6-inch parts are not specified for an 8-inch pipe. Match the plug’s stated size and intended connection to the opening you need to close.
Are a tee cap and a flue hole cover the same thing?
Not necessarily. A tee cap is described for closing the open end of a tee, often for clean-out access. A flue hole cover is described for a flue or wall opening. Choose by application as well as diameter.
Which product is specifically described for cleaning and inspection?
The Irnyso BM0029 is described for closing one end of an assembled single-wall tee and aiding cleaning and inspection. The BM0153 is also listed for sealing the bottom of a tee for clean-out access.
Which products are adjustable?
The Irnyso 6719900-style flue cover and the separate 6719900 adjustable cover are both listed for openings from 4 to 8 inches. Confirm the exact opening and installation type before selecting either.
What if I cannot tell whether my opening is 6 or 8 inches?
Measure the opening before buying. If the measurement method or fitting shape makes the result unclear, compare the existing part’s model number and specifications or consult a qualified professional.