{"product_id":"bsp-female-pipe-fittings-reducer-adapter-304-stainless-steel","title":"BSP Female Pipe Fittings Reducer Adapter, 304 Stainless Steel, 3\/8\" to 2\"","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eBSP Female Pipe Reducer Adapter — Reliable Thread Reduction in 304 Stainless Steel\u003c\/h2\u003e\n\u003cp\u003eWhen two pipes of different diameters need to connect cleanly — whether you're retrofitting an irrigation line, plumbing a workshop air system, or repairing a water supply run — a mismatched thread size can bring the whole job to a halt. These BSP female pipe fittings reducer connector adapters are designed for DIYers, plumbers, and maintenance professionals who need a dependable, corrosion-resistant solution without hunting through a hardware store bin.\u003c\/p\u003e\n\u003cp\u003eEach adapter is machined from \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e and features two female BSP (British Standard Pipe) threaded ports — a larger outer port and a smaller inner port — allowing you to step down between two pipe sizes in a single fitting. Available in 20 size combinations ranging from \u003cstrong\u003e3\/8\" × 1\/4\" (≈9.5mm × 6.4mm)\u003c\/strong\u003e up to \u003cstrong\u003e2\" × 1-1\/2\" (≈50.8mm × 38.1mm)\u003c\/strong\u003e, sold individually (1Pcs) or as a pair (2Pcs) for multi-point jobs or to keep a spare on hand.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include residential and commercial plumbing repairs, compressed-air distribution lines, garden and agricultural irrigation manifolds, and industrial fluid-transfer systems where a BSP female-to-female reducer is needed to bridge two different pipe diameters without welding or custom fabrication.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e \u003cstrong\u003eThread Compatibility:\u003c\/strong\u003e These adapters use \u003cstrong\u003eBSP (British Standard Pipe \/ G-thread)\u003c\/strong\u003e threads. BSP is \u003cem\u003enot\u003c\/em\u003e interchangeable with NPT (National Pipe Taper). Verify your existing fittings are BSP before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eSize Selection Note:\u003c\/strong\u003e The size format is \u003cem\u003eOuter Port × Inner Port\u003c\/em\u003e (e.g., 1\" × 1\/2\" = 1-inch female BSP reduces to 1\/2-inch female BSP). If you are unsure of your pipe thread size, use a thread gauge or measure the outer diameter of the male thread that will engage this fitting.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These BSP Female Pipe Reducer Adapters\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eDual Female BSP Ports\u003c\/strong\u003e — Both ends feature internal BSP threads, making this a true female-to-female reducer for connecting two male-threaded pipes of different diameters in a straight-line run.\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 chemical exposure; suitable for water, air, and fluid-transfer lines in indoor and outdoor environments where carbon steel would corrode.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWide Size Range\u003c\/strong\u003e — 20 size combinations from 3\/8\" × 1\/4\" up to 2\" × 1-1\/2\" cover the most common BSP pipe reducer scenarios in residential plumbing, irrigation, and light industrial applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePrecision-Machined Threads\u003c\/strong\u003e — Consistent thread pitch and form ensure a snug, leak-resistant fit when used with PTFE tape or thread sealant, reducing the risk of cross-threading during hand installation.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStraight Reducer Profile\u003c\/strong\u003e — The compact inline body keeps your pipe run tight and avoids the bulk of elbow-style reducers, ideal for space-constrained installations behind walls or inside junction boxes.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e1Pcs or 2Pcs Options\u003c\/strong\u003e — Order a single adapter for a one-off repair or choose the 2Pcs pack for multi-point installations and to keep a backup fitting on hand without waiting for a second shipment.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — BSP Female Pipe Reducer Adapter\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\u003eFemale-to-Female BSP Pipe Reducer Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eBSP (British Standard Pipe \/ G-thread \/ Whitworth)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Type\u003c\/th\u003e\n\u003ctd\u003eFemale (internal) on both ports\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\u003eAvailable Sizes (Outer × Inner)\u003c\/th\u003e\n\u003ctd\u003e3\/8\" × 1\/4\" up to 2\" × 1-1\/2\" — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eBrushed \/ natural stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking Pressure\u003c\/th\u003e\n\u003ctd\u003eTypically up to 150 PSI (≈10 bar) — contact us to confirm for your application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003eGenerally suitable for -20°C to 200°C (-4°F to 392°F) — see variant options for specifics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Sealant\u003c\/th\u003e\n\u003ctd\u003ePTFE tape or compatible thread sealant compound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1Pcs or 2Pcs — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Applications\u003c\/th\u003e\n\u003ctd\u003eWater supply, compressed air, irrigation, fluid transfer\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 BSP reducer adapter?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe size format is \u003cstrong\u003eOuter Port × Inner Port\u003c\/strong\u003e — for example, 1\" × 1\/2\" means the larger female port accepts a 1-inch BSP male thread and the smaller port accepts a 1\/2-inch BSP male thread. Measure your existing pipe threads with a thread gauge or caliper, then select the variant that bridges your two pipe diameters. As a quick reference: 1\/4\" BSP ≈ 13.2mm OD, 3\/8\" ≈ 16.7mm, 1\/2\" ≈ 20.9mm, 3\/4\" ≈ 26.4mm, 1\" ≈ 33.2mm, 1-1\/4\" ≈ 41.9mm, 1-1\/2\" ≈ 47.8mm, 2\" ≈ 59.6mm (all measured on the male thread OD).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat pressure rating can these BSP reducer adapters handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e304 stainless steel BSP fittings are generally rated for working pressures up to \u003cstrong\u003e150 PSI (approximately 10 bar)\u003c\/strong\u003e in standard plumbing and fluid-transfer applications. Actual ratings depend on pipe wall thickness, thread engagement, and sealant used. For high-pressure systems, please contact us to confirm suitability before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these adapters suitable for outdoor or corrosive environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. 304 stainless steel offers strong resistance to rust, oxidation, and mild chemical exposure, making these adapters well-suited for outdoor plumbing, irrigation systems, and humid environments. For highly corrosive or marine applications where chloride exposure is high, 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 — and is BSP the same as NPT?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese fittings use \u003cstrong\u003eBSP (British Standard Pipe)\u003c\/strong\u003e threads, also known as G-thread or Whitworth pipe thread. BSP is widely used in plumbing, pneumatics, and hydraulics across the US, UK, Europe, and Asia. \u003cstrong\u003eBSP is NOT directly compatible with NPT (National Pipe Taper) threads\u003c\/strong\u003e — the thread angle and pitch differ. Always verify your existing fittings are BSP 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 with these adapters?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. BSP parallel (BSPP) threads rely on a face seal or thread sealant for a leak-free connection — the threads alone do not self-seal. We recommend wrapping \u003cstrong\u003e2–3 layers of PTFE (Teflon) tape\u003c\/strong\u003e clockwise around the male threads before assembly, or using a compatible thread sealant compound for pressurized or vibration-prone systems. Do not overtighten — hand-tight plus 1–2 turns with a wrench is generally sufficient.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these adapters for gas lines?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese adapters are generally used for water, air, and fluid transfer applications. For gas line use, local codes and regulations vary by jurisdiction. Please consult a licensed plumber or gas fitter and confirm compliance with your local standards before installation. In most cases, gas-rated fittings require specific certifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy should I order the 2Pcs option instead of 1Pcs?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 2Pcs option is ideal for multi-point installations (e.g., two branch lines on the same manifold), or simply to keep a backup fitting on hand so a future repair doesn't require a second order and shipping wait. It also typically offers a lower per-unit cost compared to two separate 1Pcs purchases.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003esize 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":"3\u00268\" x 1\u00264\" \/ 1Pcs","offer_id":52336785948946,"sku":"FXL1577-0","price":2.57,"currency_code":"USD","in_stock":true},{"title":"3\u00268\" x 1\u00264\" \/ 2Pcs","offer_id":52336785981714,"sku":"FXL1577-1","price":4.34,"currency_code":"USD","in_stock":true},{"title":"1\u00262\" x 1\u00264\" \/ 1Pcs","offer_id":52336786014482,"sku":"FXL1577-2","price":3.06,"currency_code":"USD","in_stock":true},{"title":"1\u00262\" x 1\u00264\" \/ 2Pcs","offer_id":52336786047250,"sku":"FXL1577-3","price":5.56,"currency_code":"USD","in_stock":true},{"title":"1\u00262\" x 3\u00268\" \/ 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