How do I convert the millimeter sizes to inches?

Divide the mm value by 25.4 to get inches. Common conversions: 4mm ≈ 5/32" | 6mm ≈ 1/4" | 8mm ≈ 5/16" | 10mm ≈ 3/8" | 12mm ≈ 1/2" | 16mm ≈ 5/8" | 19mm ≈ 3/4" | 25mm ≈ 1" | 32mm ≈ 1-1/4" | 38mm ≈ 1-1/2".

Red Silicone Vacuum Hose — Rubber Tube for Air, Water & Oil | 2mm–38mm ID

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Red Silicone Vacuum Hose — Rubber Tube for Air, Water & Oil | 2mm–38mm ID

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Size(ID x OD): 2mm x 4mm

Length: 10 Metre

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$22.14 USD

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In stock (500 units), ready to be shipped

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Red Silicone Vacuum Hose — Flexible Rubber Tube for Air, Water & Oil Lines

Finding a vacuum hose that holds up to heat, pressure, and constant flexing without cracking or collapsing is a real challenge — especially when you need an exact size. Whether you're a DIY mechanic routing coolant lines, a hobbyist building a pneumatic system, or a plumber needing a flexible connector, a mismatched or brittle hose can cause leaks, downtime, and frustration. This red silicone vacuum hose is built for builders and fixers who need a reliable, heat-resistant tube that fits right the first time.

Each order includes a continuous length of silicone rubber hose in your chosen size combination. Available in inner diameters (ID) from 2mm (≈5/64") to 38mm (≈1-1/2"), with matching outer diameters (OD) ranging from 4mm to 44mm, and lengths of 1 metre (≈3.3 ft), 5 metres (≈16.4 ft), or 10 metres (≈32.8 ft). The wall thickness varies by size — for example, the 6mm ID × 8mm OD variant has a 1mm wall, while larger sizes carry proportionally thicker walls. Material is 100% silicone rubber, which remains flexible across a wide temperature range.

Typical applications include automotive vacuum lines and boost hose routing, coolant bypass tubes and radiator overflow connections, air compressor and pneumatic tool hose runs, and general-purpose water or oil transfer in workshop and garden settings. The bright red color also makes it easy to identify specific lines in crowded engine bays or equipment panels.

🔗 Compatibility Note: Select the ID that matches your fitting's barb or nipple OD. This hose uses standard metric sizing and fits most barbed fittings, hose clamps, and push-fit connectors designed for the corresponding ID. Not recommended for pressurized petroleum fuel lines.

✅ Key Features of These Red Silicone Vacuum Hoses

🌡️Wide Temperature Tolerance — Silicone rubber typically handles from -60°C (-76°F) to +200°C (+392°F), making this silicone vacuum hose suitable for under-hood and high-heat environments where standard rubber degrades quickly.
📐24 Size Combinations — ID options from 2mm to 38mm paired with matching ODs give you precise fitment for everything from small vacuum nipples to large coolant bypass tubes, without adapters or reducers.
✂️Cut-to-Length Flexibility — Available in 1m, 5m, and 10m rolls so you can trim exactly what you need. Silicone cuts cleanly with a utility knife, leaving a smooth, leak-free end face.
💧Multi-Fluid Compatibility — Rated for air, water, coolant, and oil transfer lines. The non-porous silicone wall resists fluid absorption and won't swell or soften with prolonged liquid contact in most workshop and automotive applications.
☀️UV & Ozone Resistant — Unlike standard EPDM or neoprene hoses, silicone rubber does not crack or harden from UV exposure or ozone, making this red rubber pipe tube a reliable choice for outdoor and engine-bay routing.
🔴High-Visibility Red Color — The bold red finish makes it easy to trace and identify specific vacuum or fluid lines in complex assemblies, reducing diagnostic time during maintenance or troubleshooting.

📐 Technical Specifications — Silicone Vacuum Hose Rubber Tube

Material	100% Silicone Rubber
Color	Red
Inner Diameter (ID) Range	2mm (≈5/64") – 38mm (≈1-1/2")
Outer Diameter (OD) Range	4mm – 44mm
Available Lengths	1 Metre (≈3.3 ft) / 5 Metres (≈16.4 ft) / 10 Metres (≈32.8 ft)
Wall Thickness	Varies by size (OD − ID ÷ 2); see variant options
Temperature Range	Typically -60°C to +200°C (-76°F to +392°F)
Fluid Compatibility	Air, water, coolant, oil (not for pressurized fuel)
UV / Ozone Resistance	Yes
Flexibility	Highly flexible; maintains shape under bend
Pressure Rating	See variant options / Contact us to confirm
Country of Origin	China

⚠️ Size Tip: Always measure your fitting's barb OD with calipers before ordering — nominal sizes can vary slightly between manufacturers. When in doubt, size down for a snug, clamp-ready fit.

❓ Frequently Asked Questions

How do I choose the right hose size?

Match the ID (inner diameter) to the fitting or nipple OD on your application. For example, a 6mm barb fitting typically requires a hose with a 6mm ID. The OD determines how much clearance you need in tight spaces. If you're unsure, measure your existing hose or fitting with calipers before ordering. Common inch equivalents: 6mm ID ≈ 1/4" | 8mm ID ≈ 5/16" | 10mm ID ≈ 3/8" | 12mm ID ≈ 1/2" | 19mm ID ≈ 3/4" | 25mm ID ≈ 1".

How do I convert millimeter sizes to inches?

Divide the mm value by 25.4. Quick reference: 4mm ≈ 5/32" | 6mm ≈ 1/4" | 8mm ≈ 5/16" | 10mm ≈ 3/8" | 12mm ≈ 1/2" | 16mm ≈ 5/8" | 19mm ≈ 3/4" | 25mm ≈ 1" | 32mm ≈ 1-1/4" | 38mm ≈ 1-1/2". These are the inner diameter (ID) values — always confirm the OD fits your routing space.

What temperature range can this silicone hose handle?

Silicone rubber generally withstands temperatures from approximately -60°C (-76°F) to +200°C (+392°F). This makes it suitable for most automotive cooling, vacuum, and air intake applications. Continuous exposure near the upper limit may vary depending on wall thickness and the specific fluid being carried.

Can this hose be used outdoors or in an engine bay?

Yes. Silicone is inherently UV-resistant and ozone-resistant, so it does not crack or harden with prolonged outdoor exposure the way standard rubber does. It is commonly used in engine bays, under-hood vacuum lines, and outdoor plumbing setups where temperature swings are a concern.

Is this hose compatible with oil and fuel lines?

This hose is suitable for oil transfer and general fluid routing in most cases. However, silicone is generally not recommended for direct contact with pressurized petroleum-based fuels (gasoline or diesel). For vacuum oil lines, coolant, and water applications, it performs reliably. If you need fuel-rated hose, please contact us to confirm compatibility.

Can I cut this hose to a custom length?

Yes. Silicone hose cuts cleanly with a sharp utility knife or dedicated hose cutter. We offer lengths of 1 metre, 5 metres, and 10 metres so you can choose the roll that best fits your project and minimize waste. Cut ends are smooth and ready for clamp or push-fit installation.

What is the wall thickness of these hoses?

Wall thickness is calculated as (OD − ID) ÷ 2. For example: 6mm ID × 8mm OD = 1mm wall | 10mm ID × 12mm OD = 1mm wall | 19mm ID × 25mm OD = 3mm wall | 38mm ID × 44mm OD = 3mm wall. Larger sizes generally carry proportionally thicker walls for added durability and pressure resistance.

How do I secure the hose to a fitting?

In most cases, a standard worm-drive hose clamp sized to the OD of the hose is the most reliable method. For low-pressure vacuum applications, the hose's natural elasticity typically provides a secure push-fit seal on barbed fittings without a clamp. For higher-pressure or vibration-prone installations, always use a clamp.

🛒 Select your size (ID × OD) and length above, then add to cart — ships from our US warehouse.

Red Silicone Vacuum Hose — Rubber Tube for Air, Water & Oil | 2mm–38mm ID

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Description

Red Silicone Vacuum Hose — Flexible Rubber Tube for Air, Water & Oil Lines

✅ Key Features of These Red Silicone Vacuum Hoses

📐 Technical Specifications — Silicone Vacuum Hose Rubber Tube

❓ Frequently Asked Questions

Red Silicone Vacuum Hose — Rubber Tube for Air, Water & Oil | 2mm–38mm ID

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