{"product_id":"304-stainless-steel-y-piece-tee-fitting-bsp-thread","title":"304 Stainless Steel Y-Piece Tee Pipe Fitting | BSP Thread | 1\/4\" to 2\"","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e304 Stainless Steel Y-Piece Tee Fitting — Reliable BSP Thread Branch Connection\u003c\/h2\u003e\n\u003cp\u003eWhen a plumbing run needs to split in two directions without sharp turbulence, a poorly chosen tee fitting can cause pressure drops, leaks, or premature wear. Whether you're a plumber routing water lines, a DIYer building an irrigation manifold, or a maintenance tech splitting a compressed-air feed, you need a fitting that holds tight, resists corrosion, and installs without guesswork.\u003c\/p\u003e\n\u003cp\u003eEach fitting is machined from \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e with a BSP (British Standard Pipe) threaded connection on all three ports. Available in eight nominal sizes from \u003cstrong\u003eDN8 (1\/4\")\u003c\/strong\u003e to \u003cstrong\u003eDN50 (2\")\u003c\/strong\u003e, sold individually (1 pc per order). The Y-shaped body angles the branch port at approximately 45° to the main run, reducing flow turbulence compared to a standard 90° T-piece.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include residential and commercial water supply branching, garden and drip irrigation manifolds, compressed-air distribution lines, and light industrial fluid systems — anywhere a smooth-flow BSP tee fitting for stainless steel pipe is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard BSP (G\/R) threaded pipe and fittings. Sizes DN8–DN50 correspond to 1\/4\" through 2\" BSP nominal. \u003cem\u003eNot directly compatible with NPT threads\u003c\/em\u003e — verify your thread standard before ordering.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 304 Stainless Steel Y-Piece BSP Tee Fittings\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBSP Thread on All Three Ports\u003c\/strong\u003e — Full BSP (British Standard Pipe) thread engagement on the inlet and both outlets ensures a secure, standardized connection compatible with BSP pipe systems worldwide.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🌊\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eY-Angle Design for Smoother Flow\u003c\/strong\u003e — The angled branch port reduces turbulence and pressure drop compared to a 90° T-piece, making this stainless steel wye fitting well-suited for flow-sensitive water and gas lines.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e304 Stainless Steel Construction\u003c\/strong\u003e — Resists rust, oxidation, and mild corrosion in water, air, and light chemical service — a durable alternative to brass or galvanized iron fittings in demanding environments.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eEight Sizes in One Listing\u003c\/strong\u003e — DN8 (1\/4\") through DN50 (2\") covers the most common residential and light commercial pipe sizes, so you can match the fitting to your existing BSP pipe thread without sourcing from multiple suppliers.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWrench-Ready Hex Body\u003c\/strong\u003e — The machined hex flats allow standard pipe wrenches or adjustable spanners to apply proper torque during installation, reducing the risk of cross-threading or under-tightening.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eLeak-Free Threaded Seal (with PTFE Tape)\u003c\/strong\u003e — When assembled with PTFE thread seal tape or pipe compound, the precision-cut BSP threads form a reliable, leak-resistant joint suitable for water supply, irrigation, and compressed-air branch connections.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eHeads up:\u003c\/strong\u003e BSP and NPT threads are \u003cem\u003enot\u003c\/em\u003e interchangeable. If your existing system uses NPT fittings (common in North America), you will need a BSP-to-NPT adapter. Check your pipe thread type before ordering.\u003c\/div\u003e\n\u003ch2\u003e📐 Technical Specifications — Stainless Steel Y-Piece BSP Tee Fitting\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eY-Piece Tee Pipe Fitting (Wye Tee)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eBSP (British Standard Pipe) — G\/R thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003eDN8 (1\/4\"), DN10 (3\/8\"), DN15 (1\/2\"), DN20 (3\/4\"), DN25 (1\"), DN32 (1-1\/4\"), DN40 (1-1\/2\"), DN50 (2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBranch Angle\u003c\/th\u003e\n\u003ctd\u003eApproximately 45° (Y \/ wye configuration)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Ports\u003c\/th\u003e\n\u003ctd\u003e3 (1 inlet + 2 outlets, all same size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eMachined \/ natural stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking Pressure\u003c\/th\u003e\n\u003ctd\u003eSee variant options — typically up to 150 PSI for standard water\/gas service; contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking Temperature\u003c\/th\u003e\n\u003ctd\u003eGenerally suitable for -20°C to 200°C (-4°F to 392°F) in water\/air service\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePacking Quantity\u003c\/th\u003e\n\u003ctd\u003e1 pc per order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Media\u003c\/th\u003e\n\u003ctd\u003eWater, air, gas, light oils (verify for chemical compatibility)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right size Y-piece tee fitting for my pipe?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch 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 \u003cem\u003enot\u003c\/em\u003e equal to the actual outer diameter of the pipe, so always go by thread designation rather than physical measurement alone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat pressure rating do these Y-piece tee fittings typically handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e304 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these fittings suitable for outdoor or corrosive environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat thread standard do these fittings use — NPT or BSP?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese fittings use \u003cstrong\u003eBSP (British Standard Pipe)\u003c\/strong\u003e thread, also referred to as G-thread (parallel) or R-thread (tapered). BSP is \u003cem\u003enot\u003c\/em\u003e 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need PTFE tape or thread sealant when installing these fittings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these Y-piece tee fittings be used for gas lines?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e304 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between a Y-piece tee and a standard T-piece tee fitting?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003ematerial, size, and quantity\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"304 stainless steel \/ DN8【1\u00264\"】 \/ 1pcs","offer_id":52336712679698,"sku":"BEAR026211x1","price":4.12,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ DN10【3\u00268\"】 \/ 1pcs","offer_id":52336712712466,"sku":"BEAR026212x1","price":4.87,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ DN15【1\u00262\"】 \/ 1pcs","offer_id":52336712745234,"sku":"BEAR026213x1","price":6.81,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ DN20【3\u00264\"】 \/ 1pcs","offer_id":52336712778002,"sku":"BEAR026214x1","price":8.6,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ DN25【1\"】 \/ 1pcs","offer_id":52336712810770,"sku":"BEAR026215x1","price":14.24,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ DN32【1-1\u00264\"】 \/ 1pcs","offer_id":52336712843538,"sku":"BEAR026216x1","price":20.55,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ DN40【1-1\u00262\"】 \/ 1pcs","offer_id":52336712876306,"sku":"BEAR026217x1","price":25.34,"currency_code":"USD","in_stock":true},{"title":"304 stainless steel \/ DN50【2\"】 \/ 1pcs","offer_id":52336712909074,"sku":"BEAR026218x1","price":36.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture2of14_5da9a000-f4da-4767-8129-0abe2a03d050.jpg?v=1781083486","url":"https:\/\/homediyer.com\/de\/products\/304-stainless-steel-y-piece-tee-fitting-bsp-thread","provider":"HomeDIYer","version":"1.0","type":"link"}