Female BSP Thread Hose Barb Straight Plastic Connector Fitting — 1/2" & 3/4" to 13mm / 16mm

Match the barb diameter to your hose's inner diameter (ID). A 13mm barb fits hose with a 13mm (approximately 1/2" or 17/32") inner diameter; a 16mm barb fits hose with a 16mm (approximately 5/8") inner diameter. When in doubt, measure your hose ID with calipers before ordering — a barb that's slightly larger than the hose ID will generally create a tighter seal.

These fittings use BSP (British Standard Pipe) female threads — 1/2" BSP or 3/4" BSP depending on the variant. BSP and NPT threads have different thread angles (55° vs. 60°) and are generally not interchangeable without a dedicated adapter. Always verify that your valve, pump, or manifold port uses BSP threading before purchasing.

Yes. The plastic body is inherently corrosion-resistant and typically performs well in outdoor, humid, or continuously wet environments such as garden irrigation systems and pond setups. Prolonged direct UV exposure may cause some plastics to become brittle over time — for long-term outdoor installations, consider shading the fittings or using UV-stabilized hose to extend service life.

Plastic hose barb fittings are generally suited for low-to-medium pressure applications — typically garden irrigation lines, aquarium circulation pumps, and gravity-fed fluid systems. For specific pressure ratings relevant to your application, please contact us to confirm before use in pressurized systems.

The barbed profile creates a friction-fit connection that holds securely in most low-pressure, static applications. For higher-flow systems, pulsating pressure, or any installation where hose pull-out would cause damage, a stainless steel or plastic hose clamp is generally recommended for added security.

The barb end is sized in millimeters (13mm or 16mm) to match hose inner diameter, while the thread end uses BSP (imperial) sizing. In practice, 13mm barbs are commonly used with hose labeled as 1/2" ID, and 16mm barbs with hose labeled as 5/8" ID — but always measure your hose ID directly, as labeling conventions can vary between manufacturers.

These fittings are generally compatible with water, mild aqueous solutions, and non-aggressive fluids. Common applications include garden irrigation water, aquarium and pond water, and general workshop fluid transfer. Avoid use with fuels, petroleum-based fluids, strong solvents, or highly corrosive chemicals unless you have confirmed material compatibility with the specific plastic used.