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

Match the fitting size to your pipe's nominal BSP thread size — not the pipe's actual outer diameter. For reference, a 1/2" BSP thread typically has an OD of about 20.9mm (≈0.82"), and a 1" BSP thread measures approximately 33.2mm (≈1.31") OD. Use a BSP nominal size chart or thread gauge to confirm before ordering. When in doubt, size up to avoid flow restriction in your water or air line.

304 stainless steel BSP fittings generally support working pressures in the range of 150–1000 PSI, depending on size and wall thickness. Smaller sizes (1/8"–1/4") typically carry higher pressure ratings than larger sizes (1"–2"). For safety-critical or high-pressure applications, always verify the rated working pressure with your system engineer or contact us to confirm.

Yes. 304 stainless steel offers good corrosion resistance in most outdoor environments and is generally suitable for water, air, and non-chloride fluid systems. It performs well in rain, humidity, and mild chemical exposure. For highly saline or chloride-heavy environments — such as coastal or marine installations — 316 stainless steel is typically the better choice.

These fittings use BSP (British Standard Pipe) threads, which follow ISO 228 / BS 2779. BSP threads are not directly compatible with NPT (National Pipe Thread) fittings common in US residential plumbing. The thread angle and pitch differ. If your existing system uses NPT threads, you will need a BSP-to-NPT adapter fitting to connect them safely.

F&F&F (Female × Female × Female) tees have internal threads on all three ports — you thread male-ended pipes or nipples into them. M&M&M (Male × Male × Male) tees have external threads on all three ports and thread into female sockets or valves. Reducer tees have a smaller branch port to step down between pipe sizes in a single fitting. Mixed configurations (e.g., M&F&F) combine port genders to suit specific plumbing layouts without extra adapters.

Yes — for leak-free connections, PTFE (Teflon) tape or a compatible thread sealant compound is generally recommended on BSP threaded joints, particularly in liquid or pressurized gas systems. Apply 2–3 wraps of PTFE tape in the direction of the thread before assembly. For BSPP (parallel) threads, a bonded seal or O-ring face seal may also be used depending on the fitting design.

304 stainless steel BSP fittings are generally compatible with compressed air and inert gas applications. Suitability for natural gas, propane, or other fuel gases depends on local building codes and the specific fitting configuration. Always consult local regulations and a licensed professional before installing any fitting in a fuel gas system.