Straight Hose Barb Reducer Connector — Plastic Pipe Fitting 2.4–15.8mm

Measure the inner diameter (ID) of both hoses you need to connect. The first number in the size option (e.g., 4mm / ≈5/32") represents the smaller barb end, and the second number (e.g., 8mm / ≈5/16") represents the larger barb end. For example, a 4mm–8mm connector joins a 4mm ID tube to an 8mm ID tube. When in doubt, size up slightly — a snug fit over the barb is generally better than a loose one.

These connectors are made from rigid plastic (typically polypropylene or a similar engineering-grade polymer). They are lightweight, corrosion-resistant, and generally suitable for low-to-medium pressure fluid transfer applications involving water and mild solutions.

Plastic barb fittings are generally rated for low-to-medium pressure applications. Working pressure typically ranges up to 60–80 PSI depending on the size and tubing material used. For high-pressure systems, please contact us to confirm suitability before ordering.

Yes. Plastic hose barb fittings are inherently corrosion-resistant and generally suitable for outdoor and wet environments. They are commonly used in garden drip irrigation, aquarium plumbing, and outdoor fluid transfer setups. Prolonged UV exposure may cause gradual degradation over time in some plastic grades.

Yes. These straight barb reducers are designed to work with standard flexible tubing including PVC, silicone, polyurethane, and rubber hose. The barbed design creates a friction-lock connection. For a more secure seal, a hose clamp is generally recommended on each end, especially in pressurized applications.

Push the appropriate end of the barb fitting firmly into the matching hose until the hose seats past the barb ridge. No tools are required for basic installation. For pressurized or vibration-prone applications, secure each end with a hose clamp for a leak-resistant connection.

These fittings are generally compatible with water, mild aqueous solutions, and non-aggressive fluids. They are not recommended for use with fuels, strong solvents, or highly concentrated acids or bases. If you are unsure about chemical compatibility for your specific application, please contact us to confirm before ordering.

No tools or thread sealant are required for basic push-fit installation. Simply push each barbed end into the corresponding hose. For added security in pressurized lines, a standard hose clamp (sold separately) over each barb end is recommended.