304 Stainless Steel Y-Piece Tee Pipe Fitting | BSP Thread | 1/4" to 2"

Match the fitting size to your pipe's nominal bore (DN) or BSP thread size. For example, a 1/2" BSP pipe corresponds to DN15, and a 1" BSP pipe corresponds to DN25. Measure the outer diameter of your pipe and compare it to standard BSP nominal sizes — or, more reliably, check the thread size stamped on your existing fittings. BSP nominal sizes are not equal to the actual outer diameter of the pipe, so always go by thread designation rather than physical measurement alone.

304 stainless steel BSP threaded fittings of this type are generally rated for working pressures up to approximately 150 PSI (≈10 bar) in standard water and gas service. Actual ratings depend on pipe wall thickness, installation quality, and the medium being conveyed. For high-pressure or safety-critical applications, contact us to confirm the rating for your specific size and use case.

Yes. 304 stainless steel offers good resistance to rust, oxidation, and mild corrosive environments, making it a solid choice for outdoor plumbing, garden irrigation systems, and light industrial use. For highly aggressive environments — such as saltwater exposure, chlorinated water, or strong acids — 316 stainless steel is typically recommended instead.

These fittings use BSP (British Standard Pipe) thread, also referred to as G-thread (parallel) or R-thread (tapered). BSP is not directly compatible with NPT (National Pipe Thread) fittings commonly used in North America. If your existing system uses NPT threads, you will need a BSP-to-NPT adapter. Please verify your pipe thread standard before ordering.

Yes — for a leak-free connection, applying PTFE (Teflon) tape or a suitable pipe thread sealant compound to the male threads before assembly is generally recommended. Wrap the tape clockwise (when viewed from the thread end) for 2–3 layers. This is standard practice for BSP threaded pipe fittings in both plumbing and industrial installations.

304 stainless steel BSP fittings are commonly used in gas distribution systems in many regions. However, gas line installations are subject to local codes and regulations. Always verify compliance with your local plumbing or gas codes, and have the installation inspected by a qualified professional before use.

A standard T-piece tee has one branch port at 90° to the main run, which can create turbulence and flow resistance at the junction. A Y-piece (wye) tee has the branch port angled at approximately 45°, resulting in a smoother flow transition, lower pressure drop, and reduced turbulence. This makes the Y-piece preferable for drainage, venting, and flow-sensitive applications where minimizing resistance matters.