Brass BSP Pipe Fittings – Nipples, Couplings, Elbows, Tees, Plugs & Caps

BSP sizes refer to the nominal bore of the pipe, not the outer diameter. A 1/4" BSP fitting typically has an OD of around 13.16mm (≈0.52"). The easiest method is to measure the thread OD of your existing male fitting with calipers, then match it to the BSP nominal size chart. When in doubt, 1/4" BSP is generally the most common size for household water and air lines.

Brass BSP fittings of this type are generally rated for working pressures up to 150–200 PSI (approximately 10–14 bar) in water and compressed air applications. Actual ratings depend on the specific fitting type, installation quality, and operating temperature. Contact us to confirm for your specific use case.

Yes. Brass is naturally corrosion-resistant and performs well in outdoor, humid, and wet environments — making it a common choice for garden irrigation branch lines and exterior compressed air connections. It is not recommended for direct burial in highly acidic soils without additional protection. For fully submerged or marine applications, stainless steel fittings may be more appropriate.

These are BSP (British Standard Pipe) threaded fittings. BSP and NPT threads are not directly interchangeable — BSP uses a 55° thread angle while NPT uses 60°, and the thread pitches differ. In some cases a 1/4" BSP and 1/4" NPT fitting may appear to thread together but will not seal reliably. If your system uses NPT threads, use a BSP-to-NPT adapter.

Male fittings (BSPM) have external threads and insert into a female port or socket. Female fittings (BSPF) have internal threads and receive a male connector. For example, a Male Elbow has external threads on both ends, while a Female Elbow has internal threads. Match the gender to your existing pipe or valve connections before ordering.

Yes, PTFE thread seal tape (plumber's tape) is generally recommended for all tapered BSPT connections to ensure a leak-free seal. Apply 2–3 wraps clockwise around the male thread before assembly. For parallel BSPP threads, a bonded seal or O-ring is typically used instead. Do not overtighten — brass threads can strip if excessive torque is applied.

These brass BSP fittings are generally compatible with water, compressed air, hydraulic oil, and many non-corrosive fluids. They are not recommended for use with acetylene, ammonia, or highly acidic/alkaline media. Contact us to confirm compatibility for specific industrial or chemical fluids before use.