Black Food Grade Silicone Tube Hose Vacuum Tubing Pipe Soft Rubber ID 0.5-25mm

Measure the outer diameter (OD) of the barbed fitting or nipple the hose will slide onto. For a firm push-fit seal, select a tube whose ID is equal to or up to 1 mm smaller than the fitting OD. For example, a 6 mm barb fits best with 5 mm or 6 mm ID tubing. If you need a looser slip fit, match ID to fitting OD exactly.

Yes. Silicone rubber maintains its shape under moderate vacuum without collapsing, provided the wall thickness is adequate for the bore size. All variants listed here have walls sized proportionally to the ID. For high-vacuum or deep-vacuum laboratory work, confirm the specific wall thickness (OD − ID ÷ 2) against your system's requirements before ordering.

Silicone has good resistance to water, coolant, and many dilute aqueous fluids. It has limited resistance to petroleum-based fuels and oils — prolonged immersion in petrol or engine oil can cause swelling. For fuel lines, a fluorosilicone or PTFE-lined hose is a more suitable choice. For coolant bypass and water routing, this silicone tubing performs well.

Food-grade silicone rubber typically withstands continuous service from −50 °C to +200 °C (−58 °F to +392 °F), with short-term peaks up to around +230 °C. This makes it suitable for engine coolant lines, autoclave connections, and hot-side brewing transfers where standard rubber would harden or crack.

Yes. The tubing is made from food-grade silicone, which does not impart taste or odour to liquids and is safe for contact with beverages, wort, and similar food-contact fluids. It is widely used in homebrewing setups for transfer lines, auto-siphons, and pump connections. Clean with standard brewing sanitisers before first use.

Use a sharp utility knife or dedicated hose cutter on a flat surface. Avoid scissors, which can compress the bore and leave a ragged edge. A clean, square cut ensures a flush seat against fittings and prevents leaks at the connection point. For very small IDs (under 3 mm), a razor blade on a cutting mat gives the cleanest result.

For low-pressure and vacuum applications, a snug push-fit over a barbed fitting is often sufficient without clamps. For any pressurised fluid line above approximately 0.5 bar, or where vibration is present, a worm-drive hose clamp or zip tie is recommended as a secondary retention measure. Always test the connection before putting the system into service.