Match the barb OD to your hose's inner diameter (ID). For example, a 6.4mm barb fitting is typically used with hose that has a 1/4" (6.35mm) inner bore. Measure your hose ID before ordering — a barb that is slightly larger than the hose ID generally creates a tighter, more secure grip. If you're between sizes, size up and use a hose clamp.

These fittings come in 1/8", 1/4", 3/8", 1/2", and 3/4" NPT. To identify your port size, measure the OD of the male thread (or the ID of the female port) and compare to NPT nominal sizing charts — note that NPT nominal size does not equal the actual thread OD. A 1/4" NPT male thread, for instance, typically measures around 0.540" (13.7mm) OD.

Yes. The plastic body is generally resistant to moisture and mild UV exposure, making these fittings well-suited for garden drip irrigation, sprinkler lines, and outdoor water routing. For installations with prolonged direct sunlight exposure, inspect periodically for any signs of UV degradation and replace as needed.

Plastic hose barb fittings of this type are typically rated for low-to-medium pressure — generally up to 60–100 PSI depending on fluid temperature, hose material, and whether a hose clamp is used. For high-pressure hydraulic or pneumatic systems, a metal fitting is recommended. Contact us to confirm suitability for your specific application.

No — NPT and BSP threads are not directly interchangeable. NPT uses a 60° thread angle with a tapered profile, while BSP uses a 55° angle. Mixing the two standards will typically result in cross-threading or leaks. Always verify the thread standard of your port before ordering. If you're unsure, contact us with your equipment make and model.

Yes, applying PTFE thread tape (plumber's tape) to the male NPT threads before installation is generally recommended to achieve a leak-free seal. Wrap the tape clockwise 2–3 times around the threads, starting from the first thread, before threading into the port. Hand-tighten first, then snug with a wrench — avoid overtightening plastic threads.

For any pressurized application, yes — a hose clamp placed over the hose at the barb is strongly recommended. It prevents the hose from blowing off under pressure and ensures a long-lasting, secure connection. For gravity-fed or very low-pressure systems (such as aquarium tubing), a clamp may not be strictly necessary but is still good practice.

These fittings are generally suitable for light-duty pneumatic applications — such as low-pressure air lines in hobby or workshop settings — within the typical pressure rating of the fitting. For industrial compressed air systems operating above 100 PSI, a metal barb fitting is typically recommended for safety and durability.