Black Fluorine Rubber Fuel Hose — Reliable FKM Vacuum & Diesel Pipe for Engine Repairs
Cracked, brittle, or leaking fuel lines are one of the most common headaches for DIY mechanics, classic car restorers, and small engine repair shops. Whether you're replacing a deteriorated vacuum hose on a daily driver or routing a new fuel line on a motorcycle restoration, you need a hose material that won't swell, crack, or degrade when exposed to petrol, diesel, or engine heat. This black fluorine rubber fuel hose is made from FKM (fluoroelastomer) — the same compound used in industrial sealing applications — giving you a durable, chemical-resistant solution you can cut to length on the bench.
Each order is sold by the meter in your chosen length — 1 Meter (≈39.4"), 2 Meter (≈78.7"), or 5 Meter (≈196.9") — and your chosen ID×OD size. Available sizes range from 2×4mm (≈5/64" ID × 5/32" OD) up to 12×16mm (≈15/32" ID × 5/8" OD), covering the most common fuel, vacuum, and breather hose diameters. Wall thickness is approximately 1–2mm across the size range, providing a firm, clamp-ready fit over standard barbed fittings.
Typical applications include petrol and diesel fuel feed and return lines, vacuum advance hoses on carbureted engines, breather and crankcase ventilation tubes on motorcycles and ATVs, and hydraulic or pneumatic low-pressure lines in workshop equipment. The black FKM fluorine rubber fuel hose is a go-to choice for anyone sourcing unleaded fuel line replacement hose or a diesel vacuum pipe for European vehicles.
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Compatibility Note: This hose is designed for low-to-medium pressure fuel, vacuum, and breather applications. It is broadly compatible with petrol (gasoline), diesel, unleaded fuel, and mineral-based oils. Not recommended for high-pressure fuel injection systems without confirming pressure ratings. Check your fitting OD against the hose ID before ordering.
✅ Key Features of These Black Fluorine Rubber Fuel Hoses
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🧪FKM Fluoroelastomer Construction — Made from fluorine rubber (FKM/Viton-type compound), offering broad resistance to petrol, diesel, unleaded fuel, and mineral oils that would degrade standard rubber hose.
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🌡️Heat-Resistant for Engine Bay Use — FKM rubber generally withstands continuous temperatures up to approximately 200°C (392°F), making it suitable for under-hood vacuum and fuel line replacement on cars and motorcycles.
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📏10 ID×OD Sizes Available — From 2×4mm up to 12×16mm, covering the most common vacuum hose sizes and fuel pipe diameters used in automotive, motorcycle, and small engine applications.
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✂️Cut-to-Length Flexibility — Sold in 1m, 2m, and 5m lengths so you can order exactly what your repair or build requires, reducing waste compared to fixed-length hose kits.
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🔒Firm Wall for Clamp-Ready Sealing — The consistent wall thickness (typically 1–2mm depending on size) holds its shape under hose clamp pressure, helping create a leak-free seal on barbed fittings without collapsing.
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🌦️Ozone & UV Resistant — Fluorine rubber resists ozone cracking and UV degradation, making it a longer-lasting choice than standard EPDM or NBR hose for exposed or engine bay routing on petrol and diesel vehicles.
📐 Technical Specifications — Black FKM Fluorine Rubber Fuel Hose
| Material |
FKM Fluoroelastomer (Fluorine Rubber) |
| Color |
Black |
| Available ID×OD Sizes |
2×4mm, 3×5mm, 3×6mm, 4×7mm, 5×8mm, 6×9mm, 7×10mm, 8×12mm, 10×14mm, 12×16mm |
| Wall Thickness |
Approximately 1–2mm (varies by size) |
| Available Lengths |
1 Meter (≈39.4"), 2 Meter (≈78.7"), 5 Meter (≈196.9") |
| Pressure Rating |
Suitable for low-to-medium pressure; see variant options for specific use case confirmation |
| Temperature Range |
Generally up to approx. 200°C (392°F) continuous; contact us to confirm for your application |
| Fluid Compatibility |
Petrol, diesel, unleaded fuel, mineral oils, hydraulic fluids (general); not for ketones or esters |
| Typical Applications |
Fuel feed/return lines, vacuum advance hoses, breather tubes, crankcase ventilation, low-pressure pneumatic lines |
| Sold As |
Continuous length (cut from roll); no fittings or clamps included |
| Country of Origin |
China |
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Sizing Tip: Always measure your fitting's outer diameter (OD) and match it to the hose's inner diameter (ID). A snug interference fit over a barbed nipple provides the best seal. If you are unsure which size fits your application, contact us before ordering.
❓ Frequently Asked Questions
How do I choose the right hose size and length?
Match the Inner Diameter (ID) to your fitting or nipple OD. For example, a 5mm nipple typically fits the 5×8mm hose. Length options are 1 Meter (≈39.4"), 2 Meter (≈78.7"), and 5 Meter (≈196.9"). When in doubt, size up — a slightly snug fit seals better than a loose one.
What pressure can this fluorine rubber hose handle?
FKM fluorine rubber hose is generally rated for low-to-medium pressure vacuum and fuel lines. It is typically suitable for vacuum lines, fuel return lines, and breather hoses. For high-pressure fuel injection systems, please contact us to confirm suitability before ordering.
Is this hose safe for outdoor or engine bay use?
Yes. FKM (fluoroelastomer) rubber is known for its resistance to heat, ozone, and UV exposure. It generally performs well in engine bay environments where temperatures can reach 200°C (392°F) and above in short bursts. For continuous high-heat applications, verify your specific operating conditions with us.
What fuels and fluids is this hose compatible with?
Fluorine rubber (FKM/Viton-type) is broadly compatible with petrol (gasoline), diesel, unleaded fuel, mineral oils, and many hydraulic fluids. It is generally resistant to fuel additives and ethanol-blended fuels. Avoid use with ketones, esters, or amines without confirming chemical compatibility first.
How do I select between the ID×OD size options?
The first number is the Inner Diameter (ID) — this must match your fitting or barb OD. The second number is the Outer Diameter (OD) — this determines wall thickness and clamp sizing. Available sizes range from 2×4mm up to 12×16mm, giving a wall thickness of approximately 1–2mm across variants.
Can I use this hose for vacuum lines on a car or motorcycle?
Yes. This fluorine rubber tube is commonly used for vacuum lines, breather hoses, and fuel vent lines on cars, motorcycles, and small engines. The smaller sizes (2×4mm, 3×5mm) are typically used for vacuum and breather applications, while larger sizes suit fuel feed and return lines.
Does this hose require hose clamps?
For fuel and pressurized lines, using hose clamps is strongly recommended to ensure a leak-free seal. For vacuum and breather lines operating at low pressure, a snug push-fit over a barbed fitting is generally sufficient, though clamps add extra security. Clamps are not included with this listing.
🛒 Select your size and length above, then add to cart — ships from our US warehouse.
