BSP Tee & Cross Pipe Fittings — 304 Stainless Steel, 1/8" to 2", Equal & Reducer

Match the fitting size to your existing pipe's BSP thread diameter. BSP sizes refer to the nominal bore, not the outer diameter — for example, a 1/2" BSP fitting typically has an outer thread diameter of approximately 20.9mm (≈0.825"). Measure your pipe threads or check your system's documentation before ordering. If you're connecting pipes of different diameters, choose a reducer tee variant from the options above.

304 stainless steel BSP fittings generally support working pressures in the range of 150–1000 PSI depending on size and wall thickness. Larger sizes typically have lower pressure ratings. Please contact us to confirm the specific pressure rating for your chosen size before use in high-pressure systems.

Yes. 304 stainless steel offers good corrosion resistance in most outdoor and wet environments, and is suitable for fresh water, mild chemical exposure, and general outdoor plumbing. For marine or highly chlorinated environments, 316 stainless steel is generally recommended instead. These fittings are not intended for use with strong acids or chlorine-heavy solutions.

No — these fittings use BSP (British Standard Pipe) threads, which are not directly interchangeable with NPT threads. BSP threads have a 55° thread angle, while NPT uses a 60° angle. Using BSP fittings on NPT pipes will result in leaks or cross-threading. Please verify your system's thread standard before purchasing. If you need NPT fittings, contact us and we can point you to the right product.

An Equal tee has all three ports at the same diameter, allowing a single pipe line to split into two branches of the same size. A Reducer tee has a smaller branch port, letting you tap off a smaller-diameter line from a main run — for example, a 1"–1/2"–1" reducer tee lets you branch a 1/2" supply line off a 1" main without a separate reducing bushing.

For BSPT (tapered) threads, PTFE tape or pipe thread sealant is typically recommended to ensure a leak-free seal. For BSPP (parallel) threads, a bonded seal or O-ring is generally used instead of tape. Always follow local plumbing codes and the fitting manufacturer's guidance for your specific application and fluid type.

A Female Tee has internal (female) threads on all three ports — you thread male-ended pipes or fittings into it. A Male Tee has external (male) threads on all ports. Mixed configurations use F (Female) and M (Male) to indicate each port in order: run–branch–run. For example, FMF means both run ports are female and the branch port is male; MFF means the first run port is male and the remaining two are female.