BSP Hose Barb Fittings — Male/Female Thread Connectors, Elbows, T/Y/X Splitters

The barb size should match your hose's inner diameter (ID). For example, a 10mm barb is typically used with hose that has a 10mm ID. Measure the inside of your hose before ordering. Common sizes in this listing range from 4mm (≈5/32") to 25mm (≈1"). If your hose ID falls between two sizes, generally choose the smaller barb for a tighter grip.

Male Thread (BSPM) fittings have external threads that screw into a female-threaded port, valve, or coupling. Female Thread (BSPF) fittings have internal threads that accept a male-threaded pipe or fitting. Choose based on the thread type of the port you are connecting to — if your port has internal threads, you need a male thread fitting, and vice versa.

Stainless steel variants are generally suitable for outdoor and high-moisture applications due to their corrosion resistance. Brass fittings are also corrosion-resistant but are typically better suited for indoor plumbing, fuel, and compressed air lines. For fully submerged or marine-adjacent use, stainless steel is generally the recommended choice. In most cases, both materials perform well in standard workshop and garden environments.

These fittings use BSP (British Standard Pipe) threads, which are widely used in plumbing, pneumatics, and hydraulics across the UK, Europe, Australia, and many other regions. BSP threads are not directly compatible with NPT (National Pipe Thread) used in North America — the thread pitch and angle differ. A BSP-to-NPT adapter is required if connecting to NPT-threaded equipment.

Working pressure varies by size, material, and application. Stainless steel fittings generally handle higher pressures than brass in comparable sizes. Smaller thread sizes typically support higher pressure ratings than larger sizes. For specific pressure ratings relevant to your application, please contact us to confirm suitability before ordering.

Brass fittings are commonly used in fuel line applications and are generally compatible with diesel, gasoline, and similar petroleum-based fuels. Stainless steel is also fuel-compatible. Always verify chemical compatibility with your specific fuel type and concentration before installation, particularly for ethanol-blended fuels or specialty chemicals.

Yes, PTFE thread seal tape (plumber's tape) is generally recommended for BSP parallel threads to ensure a leak-free seal. Apply 2–3 wraps clockwise around the male thread before assembly. BSP tapered threads may self-seal under pressure but tape is still advisable for most applications, especially in air and water systems.

Use a T-Piece when you need to split one hose line into two at a 90° angle (three ports total). Use a Y-Piece when you need to split one line into two at an angled branch (typically around 45°), which is generally better for flow efficiency. Use an X-Piece (cross fitting) when you need four-way flow distribution from a single point. Choose based on your routing requirements and available space.