Custom Cleaning Brush
75mm SS304 Flue Brush
SS304 wire on a twisted core, threaded for standard extension rods, so one 75 mm head clears soot and light tar down a full chimney or boiler run.
Medium brush
100 pcs
Minimum order
Worked with two hands or on a pole: chimney, gutter and pond-filter brushes, discs, cups and tank brushes.
Production lead time, once the specification is confirmed
- Up to 100 pcsWithin 7 days
- 101–5,000 pcsWithin 14 days
- 5,001–50,000 pcsWithin 21 days
- Over 50,000 pcsConfirmed with your quotation
Peak season can extend these times; the shipping date is confirmed in writing with your quotation. Sampling and shipping are quoted separately.
A 75 mm diameter stainless steel chimney flue brush with SS304 wire bristles on a twisted-wire core, sized for round flue liners, stove pipes, and boiler passages. The threaded connection accepts standard extension rods so one brush head can clean the full height of a chimney run while the stiff bristles remove soot, ash, and light tar.
What can this brush do for you?
Full-circumference contact in 75 mm round passages
The round head places SS304 bristles against the entire wall on every push and pull stroke. A brush that is undersized leaves a soot band along one side; at 75 mm nominal diameter, the bristle tips stay loaded against the liner wall and sweep loose deposits instead of just stirring them.
SS304 wire keeps its stiffness in acidic flue gas
Soot and ash can be slightly acidic, especially when moisture is present, and plain carbon steel bristles rust and lose spring quickly. SS304 bristles resist that corrosion, so the brush keeps scraping rather than becoming a rust-stained tool that sheds wire into the flue.
Threaded connection builds a full-length chimney tool
The removable threaded connection lets you add standard extension rods section by section from the cleanout or the top. The 400 mm handle is the control point near the access opening; additional rods carry the 75 mm head deeper without changing the brush itself.
Twisted-wire core locks each bristle into place
Bristles are set into the double-spiral wire core under tension, not glued or clamped. If one bristle snaps, it remains anchored in the core rather than falling into the flue. That reduces the chance of loose wire blocking a cleanout or entering a boiler passage.
Round profile feeds through joints and slight offsets
A round head has no corners to catch on liner joints or minor misalignment. When the flue has a shallow offset, the brush can rotate slightly and continue; the 220 mm head length still keeps enough bristle contact to clean the section instead of skipping over it.
What is a 75mm SS304 Flue Brush?
A 75mm SS304 Flue Brush is a manual round flue-cleaning tool built around a nominal 75 mm diameter brush head. The head is 220 mm long, filled with stainless steel 304 wire bristles, and anchored in a twisted wire core. A 400 mm handle with a 22 mm grip provides the operating end, and a threaded removable connection allows the handle to be replaced with longer rod sections for tall chimneys.
In use, the operator feeds the brush into the cold flue and works it with push, pull, and partial rotation strokes. The bristle tips scrape soot, ash, and loose carbonized deposits from the liner wall; loosened debris falls to the cleanout or is brushed out of the vent section. The tool is designed for round passages close to 75 mm internal diameter. It is not a square-flue brush, a rotary power tool, or a glaze-breaking scraper for heavy creosote.
Technical Specifications
| Parameter | Value / Options |
|---|---|
| Nominal brush diameter | 75 mm |
| Head shape | Round |
| Working head length | 220 mm |
| Bristle material | SS304 stainless steel wire |
| Core / stem | Twisted stainless steel wire core (304); galvanized steel wire core optional |
| Handle length | 400 mm standard |
| Grip diameter | 22 mm |
| Connection | Threaded removable, for extension rods and replacement heads |
| Operating condition | Cold or cooled flue; wet or dry soot removal; light chemical exposure |
| Brush type | Custom Tube & Pipe Bore Brushes |
| How it is driven | Hand-driven on rods or a flexible shaft |
| Cleaning target | round stainless steel or clay chimney liner, wood stove and pellet stove vent pipe, and boiler fire tube and heat exchanger passage cleaning |
| Surface or part | flues, passages, walls, pipes, vents, vent sections, boiler passages, and tubes |
| Residue or debris | soot, ash, carbon, tar, loose scale, clay, pellets, and carbonized deposits |
| Mounting / connection | Threaded removable, for extension rods and replacement heads |
These are the standard dimensional values. The 75 mm diameter is meant for flues and passages with a nominal internal diameter close to 75 mm; we can adjust the diameter, head length, thread size, and handle length to match your liner and rod system.
Where does this brush work best?
- Round stainless steel or clay chimney liners with a nominal 75 mm internal diameter, where full-contact brushing is needed from a cleanout or roof access.
- Wood stove and pellet stove vent pipes that collect soot and ash on the inside wall and need regular manual brushing.
- Boiler fire tubes and heat exchanger passages at 75 mm nominal, where the brush is used for scheduled tube maintenance or as a final pass after power cleaning.
- Round vent sections and flue connectors with loose scale or powdery carbon that can be removed with a manual push-pull stroke.
- Chimney runs where an extension rod system is already in place and only the 75 mm brush head needs to be purchased as a replacement.
How do I choose the right one?
Match the diameter to the narrowest flue ID
Measure the internal diameter at several points, including joints and offsets. For a rigid round liner, a brush 3–6 mm larger than the measured ID usually maintains better wall contact. For a corrugated or flexible liner, keep the brush at or slightly below the smallest ID so the bristles do not snag on corrugations. The 75 mm size is correct when the passage measures close to 75 mm; do not force it into a smaller flue.
Check the residue before choosing SS304
SS304 bristles are right for loose soot, ash, and powdery or lightly tarry deposits. If the flue has hard, glazed creosote or thick baked carbon, the brush will slide over the surface instead of removing it. In that case, run a chemical creosote treatment or a rotary steel brush first, then use this brush as the cleanup pass.
Confirm the core and connection
The standard twisted stainless core is the better choice for repeated use and acidic flue conditions. A galvanized wire core costs less upfront but corrodes faster in wet, acidic environments and should be inspected and replaced sooner. Verify the threaded connection matches your existing rods; if you do not have rods, specify the thread size and we will match it.
Decide between manual and power cleaning
This brush is built for manual push-pull cleaning with extension rods, not for motorized rotation. If you intend to drive the brush with a drill or rotary machine, choose a rotary-rated brush with a reinforced core and machine coupling. Running this manual flue brush under power can overheat the core and shed bristles.
Can I customize this brush?
A standard 75mm SS304 flue brush works for many round flues, but liners, rod systems, and access conditions vary. The following can be adjusted for your project:
- Diameter — from the standard 75 mm to any diameter that matches your liner ID, including oversize allowances for rigid liners.
- Head length — lengthen or shorten the 220 mm working section for a specific cleaning zone or for passage around an offset.
- Bristle material — SS304 is standard; SS316, brass, nylon, or abrasive-impregnated filaments can be specified where corrosion, spark sensitivity, or surface condition requires it.
- Bristle fill — wire diameter, double-spiral density, and trim length can be adjusted to change stiffness and contact pressure.
- Core — twisted stainless steel or galvanized steel wire, selected for the flue environment and expected service life.
- Connection — thread type, size, and gender matched to your existing rods; quick-release or bayonet ends available for faster changeover.
- Handle — length, grip diameter, ergonomic grip, D-handle, T-bar, or fixed welded handle for a dedicated tool.
- Marking and packaging — color coding, laser marking on the handle, bulk cartons, individual bags, or project-specific packing.
To define the right configuration, provide the flue ID and liner type, total run length and number of offsets, access location, thread specification of your rods, residue condition, and whether cleaning is manual or machine-assisted. A drawing or photo of the flue and rod connection helps us verify the fit. We can also support project-specific material documentation, inspection requirements, or third-party testing during the customization process.
Which filament lasts longest on a 75mm SS304 flue brush?
How do I verify the brush will pass through my flue before ordering?
Measure the internal diameter at the narrowest point, including joints, offsets, and any dampers. For rigid liners, the brush can be slightly larger than the ID; for corrugated liners, use the smallest measured ID and keep the brush at or below that value. If the flue has sharp bends, check that the 220 mm head plus handle or rod assembly can make the turn without binding.
Can I use this brush with a power drill?
No. The threaded connection and twisted-wire core are designed for manual extension rods and push-pull strokes. Motorized rotation can overheat the core, loosen bristles, and damage the liner. If you need power cleaning, specify a rotary chimney brush with a reinforced core and an appropriate machine coupling.
Will SS304 bristles damage my flexible liner?
Stainless steel bristles are intended to scrape loose deposits from metal and clay liners, but a brush that is too large or forced through a corrugated liner can mark the surface. Keep the diameter close to the liner ID, avoid aggressive back-and-forth motion in flexible sections, and stop if the brush catches on a corrugation.
How do I know when to replace the brush head?
After each job, check for flattened or missing bristles, a frayed or unwinding core, and worn connection threads. If the 75 mm head no longer contacts the wall evenly, or if wires are permanently bent and do not spring back, replace the head. A damaged core can break inside the flue and create a retrieval problem.
Can this brush be used in a square or rectangular flue?
No. A round brush cannot reach the corners of a square or rectangular flue, and forcing it through can jam and push deposits into the corners. Use a square flue brush matched to the internal dimensions, and keep this 75 mm round brush for round passages close to 75 mm.
Does this brush remove all creosote?
The SS304 bristles remove loose soot, ash, and soft or powdery deposits. Hard, glazed creosote usually requires a chemical treatment or a rotary steel brush first; this brush is most effective as a routine maintenance tool and as the final cleanup pass, not as a glaze-breaking scraper.
Guides that go deeper on this
We have not written a guide specific to this one yet. The material that covers selection, filament, dimensions, maintenance and sourcing is collected in the technical resources library.
Custom Manufacturing RFQ
Describe Your Application
For an accurate quotation, please provide the main dimensions, material preference, working surface, residue, quantity, and a drawing or photo.
Drawing or photo optional — it speeds things up, it does not gate the enquiry.
Custom Brush RFQ
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Upload a drawing, product photo, or sample photo and provide the core dimensions and cleaning conditions.
“We need a brush to remove wet residue from a stainless steel conveyor, about 800mm wide. The current brush wears quickly. We can send photos.”
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