Food Grade Red Silicone Rubber Tubing — Flexible Hose for Water, Air & Drinking Lines

Measure the outer diameter (OD) of the fitting or barb nipple the tube will slip over, then select a tube whose inner diameter (ID) matches or is very slightly smaller for a snug, leak-resistant fit. All sizes on this listing are expressed as ID×OD — for example, a 6×8mm tube has a 6mm inner bore and an 8mm outer diameter.

To convert millimeters to inches, divide by 25.4: 6mm ≈ 0.24", 8mm ≈ 0.31", 10mm ≈ 0.39", 12mm ≈ 0.47", 16mm ≈ 0.63". When in doubt, size down slightly — silicone stretches to accommodate a barb that is 0.5–1mm larger than the ID.

Yes. This tubing is made from food-grade silicone, which is generally non-toxic, odorless, and tasteless. It is widely used in home brewing, aquariums, beverage dispensing, and other food or drink applications. Silicone does not leach plasticizers or BPA. Always verify the specific grade meets your local regulatory requirements (e.g., FDA, NSF) for your intended use.

Food-grade silicone tubing generally withstands temperatures from approximately -60°C (-76°F) to +200°C (+392°F). This makes it suitable for cold-water lines, ambient-temperature fluid transfers, and moderate-heat applications such as coolant routing. It is not recommended for direct flame contact or sustained steam sterilization above these limits.

Silicone has good UV and ozone resistance compared to standard rubber or PVC, so it generally performs well in outdoor or workshop settings with ambient UV exposure. Prolonged direct sunlight over many years may cause gradual surface dulling, but the tubing typically retains its flexibility and sealing properties far longer than conventional rubber hose in the same conditions.

This tubing works with standard barbed fittings and hose nipples in brass, stainless steel, or plastic. No special thread standard is required — the tube simply slips over the barb. Select a barb whose OD equals or is up to 1mm larger than the tube's ID for a secure, leak-resistant seal. Hose clamps can be added for higher-pressure or vibration-prone connections.

Working pressure varies by wall thickness and tube diameter. Smaller, thin-walled sizes (e.g., 0.5×1mm, 1×3mm) are suited for low-pressure applications such as aquarium air lines and gravity-fed fluid transfers. Larger sizes with thicker walls (e.g., 10×16mm, 16×21mm) can typically handle moderate pressures. For pressure-critical systems, contact us to confirm the rating for your specific size before ordering.

For aquarium air lines, sizes in the 0.5×1mm to 4×6mm range are most common and match standard aquarium air pump outlets and check valves. For home brewing siphoning and wort transfers, 8×10mm to 12×16mm tubing is generally preferred and fits most auto-siphons and racking canes. Match the tube ID to your pump outlet or fitting OD for the best flow and seal.