The best match depends on the shape and measurements of your stove outlet: the listed stove-pipe options are oval-to-round adapters, not square-to-round fittings. The Imperial 6-inch adapter is a simple option when its dimensions fit; the LLPParts 6-inch model provides stated measurements for checking fit. The 7-inch LLPParts model suits a different pipe size. For non-stove ventilation projects, Angoily offers a general square-to-round transition. Confirm the appliance instructions, connector dimensions, and venting requirements before buying or installing any adapter.
| Product | Best suited for | Key distinction |
|---|---|---|
| Imperial 6-inch Oval Round Adapter | Buyers seeking a basic 6-inch oval-to-round fitting | Listed as an oval-to-round adapter |
| LLPParts 6-inch Adapter | Buyers who need stated dimensions for fit checks | Oval measures 7-1/2 x 3-1/2 inches |
| LLPParts 7-inch Adapter | Buyers with a 7-inch round-pipe setup | 24-gauge black single-wall fitting, per product name |
| Angoily Square-to-Round Adapter | General ventilation duct projects | Not identified as a wood-stove connector |
| Moxweyeni 6-to-5 Reducer | Wood-stove pipe size transitions | Changes pipe diameter, not shape |
Imperial 6-Inch Oval Round Adapter
The Imperial BM0037 is listed as a 6-inch oval round adapter in black. It is the most straightforward choice in this group for a buyer who needs an oval-to-round transition and has confirmed that the adapter’s dimensions match the stove outlet and connected pipe.
Best for: Buyers looking for a simple 6-inch oval-to-round stove-pipe fitting. It was selected because its product name directly identifies both the nominal size and the transition shape relevant to many stove-pipe searches.
Check before buying: The supplied product information does not give the oval opening dimensions, overall height, or detailed connection orientation. Compare the actual outlet and pipe measurements rather than relying on the 6-inch label alone.
Limitation: This is described as oval-to-round, not square-to-round. Avoid it if the stove outlet is genuinely square or if the required pipe size is not 6 inches.
LLPParts 6-Inch Oval-To-Round Adapter
This black 24-gauge adapter is described for wood stoves with oval flue collars that connect to 6-inch round pipe. The listing gives the oval side as 7-1/2 by 3-1/2 inches and the overall height as 9-1/4 inches. It says the oval side is crimped to fit inside the stove’s oval opening, while the round side measures 6-1/8 inches and accepts crimped 6-inch pipe.
Best for: Buyers with an oval stove collar and 6-inch round pipe who want product dimensions to compare with their existing vent parts. These measurements make it easier to assess fit before purchase.
Why it was selected: It is specifically described for wood-stove use and gives more fit information than the other listed oval-to-round options.
Limitation: It is not a square-to-round fitting, and its listed oval dimensions must match the stove collar. Do not assume that a nominal 6-inch pipe designation confirms every connection will fit.
LLPParts 7-Inch Oval-To-Round Adapter
The LLPParts product is identified as a single-wall, 7-inch wood-stove-pipe oval-to-round adapter in 24-gauge black metal. Its product name also describes it as a replacement for Gray Metals OEM, and the listing includes the identifier 7X7-610-3PC. The supplied feature information does not provide detailed opening measurements.
Best for: Buyers whose stove has an oval flue collar and whose vent system calls for a 7-inch round connection. It was selected because it is explicitly a wood-stove oval-to-round adapter in a size distinct from the 6-inch choices.
Choose this if: You have verified both the collar dimensions and the required round-pipe diameter against your appliance documentation and existing vent components.
Limitation: The listed information does not state the oval opening size or overall height. It is not a square-to-round adapter, so it is unsuitable when the opening is square or the pipe is 6 inches.
Angoily Square-To-Round Duct Adapter
Angoily describes this product as a single-piece transition from a rectangular base connection to a round duct opening. Its stated uses include range-hood, fresh-air, and air-purifier ventilation projects when the physical dimensions match the duct layout.
Best for: Buyers who need a general square- or rectangular-to-round ventilation transition and are not specifically seeking a wood-stove flue fitting. It was selected because it directly matches the shape transition in the search phrase.
Check before buying: The supplied details do not give the inlet and outlet measurements or identify it as a stove-pipe connector. Measure both duct openings and confirm the fitting is suitable for the intended ventilation application.
Limitation: Do not treat a general duct transition as a wood-stove adapter based on shape alone. The listing names ventilation projects such as range hoods and air purifiers, not wood-stove venting.
Moxweyeni 6-To-5-Inch Stove Pipe Reducer
This black matte fitting is described as a stove-pipe reducer for changing from 6-inch to 5-inch ducting. The listing says the 6-inch collar is uncrimped and fits into 6-inch flexible duct, while the 5-inch collar is crimped. It is a diameter-changing connector, rather than a square-to-round or oval-to-round transition.
Best for: Buyers whose wood-stove vent layout requires a 6-to-5-inch size change and whose existing components match the stated collar arrangement. It was included because it is a stove-pipe fitting, although it does not change the duct shape.
Why it may not fit this search: If the problem is a square or oval stove outlet that must connect to round pipe, this reducer does not address that shape mismatch.
Limitation: The listing’s general fit language does not replace checking the stove manufacturer’s required flue size and connector arrangement. Do not reduce pipe size unless the appliance instructions permit it.
Buying Guide: How to Choose a Stove Pipe Adapter
Is the outlet square, rectangular, or oval?
Start by identifying the exact shape of the stove’s flue collar. Product listings sometimes use “square” loosely when describing a rectangular duct base, while stove-pipe products may be designed for an oval collar. These shapes are not automatically interchangeable. Measure the opening at its widest points and compare those measurements with the adapter’s stated inlet dimensions.
For an oval-to-round connection, the Imperial and LLPParts options are the relevant listed stove-pipe products. For a square- or rectangular-to-round ventilation transition, the Angoily fitting describes that shape change, but its listing does not identify it as a wood-stove part.
What round pipe diameter do you need?
Check the stove documentation and the diameter marked or measured on the existing pipe. The listed stove-related products include 6-inch and 7-inch oval-to-round adapters, plus a 6-to-5-inch reducer. A size reducer changes diameter; it does not convert an oval or square opening to round.
Do not choose an adapter solely because one end appears to fit. The outlet size, connection direction, and permitted vent configuration all need to suit the stove and the rest of the system.
Which dimensions should you verify?
- Measure the stove collar’s shape and opening dimensions.
- Confirm the round pipe’s nominal diameter.
- Check which side is crimped and whether that matches the pipe connection.
- Review the adapter’s overall height and clearance where that information is available.
- Compare all measurements with the appliance instructions and vent-system requirements.
The LLPParts 6-inch listing provides an oval measurement, overall height, and round-side measurement. The other listings provide less detailed fit information, so buyers should request or verify missing dimensions before ordering.
Does an HVAC duct transition work for a wood stove?
Not necessarily. A fitting made for general ventilation can have the right shape while lacking the application information needed for stove venting. The Angoily product is described for duct projects such as range hoods, fresh-air routes, and air purifiers. The supplied details do not establish it as suitable for a wood-stove flue.
For wood-stove installations, follow the appliance manufacturer’s instructions and applicable local requirements. If a product listing does not clearly identify the intended stove-pipe use, confirm suitability with the manufacturer or a qualified installer.
Should you choose a replacement-style adapter?
The LLPParts 6-inch and 7-inch listings describe the products as replacements for Gray Metals OEM. That wording may help buyers looking for a replacement, but it does not prove that every model or collar will match. Verify the dimensions and connection arrangement rather than relying on brand or replacement language alone.
Frequently Asked Questions
Is a square-to-round adapter the same as an oval-to-round adapter?
No. A square-to-round adapter transitions from a square or rectangular opening to a round duct. An oval-to-round adapter is shaped for an oval collar. Confirm the actual outlet shape before choosing.
Which listed product is intended for a 6-inch oval stove collar?
The LLPParts 6-inch adapter is described for wood stoves with oval flue collars and 6-inch round pipe. Its listed oval side measures 7-1/2 by 3-1/2 inches. Check those dimensions against the stove collar.
Can I use the Angoily adapter on a wood stove?
The supplied product details describe general ventilation projects, not wood-stove venting. They do not establish that it is suitable for a wood-stove flue, so confirm suitability before considering it for that use.
Does the Moxweyeni reducer change a square outlet to round?
No. It is described as a 6-to-5-inch stove-pipe reducer. It changes pipe diameter, not the shape of the opening.
How do I know whether to buy the 6-inch or 7-inch adapter?
Use the size required by the stove and existing vent system, as specified in the appliance instructions. Measure the connected pipe and verify the adapter’s connection dimensions before ordering.