Nitrile Smooth Rubber Fuel Unleaded Petrol Diesel Oil Line Hose Pipe Tubing 2~19

Measure the outside diameter of the barbed fitting or nipple the hose will slide onto — this should match the hose's inner diameter (ID). The outer diameter (OD) determines clearance in tight routing spaces. For example, if your carburettor inlet barb measures 6 mm across, select the 6 mm ID variant. When in doubt, size down rather than up: a slightly snug fit over a barb seals better than a loose one.

Nitrile rubber (NBR) performs well with standard unleaded petrol and E10 blends. It is generally not recommended for fuels with ethanol concentrations above E20, as higher ethanol content can cause NBR to swell over time. If your application uses E85 or flex-fuel, consider a fluorocarbon (FKM/Viton) hose instead.

Working pressure varies with wall thickness and inner diameter — smaller ID variants with thicker walls tolerate higher pressures. This hose is designed for low-to-medium pressure fuel and oil transfer applications (gravity-fed tanks, carburettor lines, oil galleries). For high-pressure hydraulic circuits or fuel-injection systems, a reinforced braided hose rated to your system's peak pressure is required. Contact us to confirm suitability for your specific pressure rating.

Yes. Nitrile rubber has good resistance to diesel fuel, making this hose suitable for diesel supply and return lines on generators, agricultural machinery, and marine engines operating at low-to-moderate pressures. Ensure the ID matches your fitting barb and that the hose is secured with appropriate clamps at each end.

Use a sharp utility knife or dedicated hose cutter rather than scissors. Mark the cut line with a felt-tip pen, then make a single firm cut perpendicular to the hose axis. A clean square cut ensures full contact with the barb and an even clamp seat. Avoid sawing back and forth, which leaves a ragged edge that can leak under pressure.

Standard worm-drive (Jubilee-style) hose clamps and ear-type crimp clamps both work well with the smooth outer surface of this hose. Select a clamp whose range spans the hose OD. Tighten worm-drive clamps to finger-tight plus a quarter turn — over-tightening can cut into the rubber and cause a slow leak. For permanent installations, ear-type crimp clamps provide a more consistent seal.

Yes. NBR nitrile rubber is one of the most widely used elastomers for mineral oil and hydraulic fluid resistance. This hose is suitable for oil gallery connections, gearbox breather lines, and low-pressure hydraulic return lines. It is not compatible with phosphate-ester hydraulic fluids (e.g., Skydrol) or synthetic polyol-ester fluids — check your fluid's compatibility with NBR before installation.