{"product_id":"90-degree-brass-barb-elbow-fittings-reducing-hose-joiner","title":"90° Brass Barb Elbow Fittings — Reducing Hose Joiner for Fuel, Air \u0026 Fluid Lines","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e90° Brass Barb Elbow Fittings — Reliable Reducing Hose Joiner for Fuel, Air \u0026amp; Fluid Lines\u003c\/h2\u003e\n\u003cp\u003eRouting hoses around tight corners without kinking, or connecting two hoses of different diameters, is one of the most common headaches in automotive, small engine, and DIY fluid system work. Whether you're rebuilding a carburetor fuel line, routing air tubing in a compressor setup, or plumbing a coolant bypass, a poorly chosen fitting leads to leaks, blow-offs, and wasted time. These 90° brass barb elbow fittings are built for exactly these situations — giving hobbyists, mechanics, and DIYers a dependable connection point that holds under pressure.\u003c\/p\u003e\n\u003cp\u003eEach fitting is machined from solid brass and features a 90-degree elbow profile with barbed ends designed to grip flexible hose from the inside. Available in both equal-diameter sizes (4mm through 19mm) and reducing configurations (e.g., 6-4mm, 8-6mm, 10-4mm, 12-10mm), each set contains 1, 2, or 5 pieces depending on the quantity option selected. Size notation for reducing fittings follows the format larger barb – smaller barb: for example, 10-6mm means one end accepts a 10mm (≈3\/8\") ID hose and the other accepts a 6mm (≈1\/4\") ID hose.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include fuel line routing on small engines and carbureted vehicles, air line connections in pneumatic and compressor systems, and coolant or water bypass hose routing in automotive and HVAC applications — anywhere a 90-degree hose barb elbow fitting or a reducing hose joiner is needed to change direction or step between hose sizes.\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 flexible rubber, silicone, and PVC hoses with matching inner diameters. Reducing variants allow connection between two different hose sizes. Use with a hose clamp for pressurized systems.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eSize Note:\u003c\/strong\u003e Select your size based on your hose's \u003cem\u003einner diameter (ID)\u003c\/em\u003e, not outer diameter. For reducing fittings, the format is \u003cem\u003elarger barb – smaller barb\u003c\/em\u003e (e.g., 10-6mm). See variant options for the full size range.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 90° Brass Barb Elbow 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\u003eSolid Brass Construction\u003c\/strong\u003e — Machined from brass for durability, corrosion resistance in fuel and water environments, and a secure, long-lasting connection in both automotive and DIY fluid line applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e↩️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eTrue 90° Elbow Profile\u003c\/strong\u003e — The right-angle barb design lets you route hoses around corners without kinking, making it ideal for tight engine bays, compressor cabinets, and space-constrained plumbing runs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔀\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eReducing \u0026amp; Equal Sizes Available\u003c\/strong\u003e — Choose from equal-diameter sizes (4mm–19mm) or reducing configurations (e.g., 8-6mm, 12-8mm) to step between hose sizes at a 90-degree angle — no adapter needed.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMulti-Fluid Compatible\u003c\/strong\u003e — Suitable for fuel, air, water, and coolant lines. The brass material is generally compatible with gasoline, diesel, compressed air, and water-based fluids in typical operating conditions.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBarbed Grip Design\u003c\/strong\u003e — The ribbed barb profile bites into the hose inner wall to resist pull-out. Pair with a standard hose clamp for a leak-free seal in pressurized fuel or air line installations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Quantity Options\u003c\/strong\u003e — Available in 1, 2, or 5-piece sets so you can buy exactly what your project needs — whether it's a single repair or stocking up for multiple hose barb elbow fitting installations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — 90° Brass Barb Elbow Fittings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFitting Type\u003c\/th\u003e\n\u003ctd\u003e90° Elbow Barb (Hose Joiner)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003ctd\u003eEqual diameter \u0026amp; Reducing (step-down)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEqual Sizes Available\u003c\/th\u003e\n\u003ctd\u003e4mm (≈5\/32\"), 6mm (≈1\/4\"), 8mm (≈5\/16\"), 10mm (≈3\/8\"), 12mm (≈1\/2\"), 14mm (≈9\/16\"), 16mm (≈5\/8\"), 19mm (≈3\/4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReducing Sizes Available\u003c\/th\u003e\n\u003ctd\u003e6-4mm, 8-4mm, 8-6mm, 10-4mm, 10-6mm, 10-8mm, 12-6mm, 12-8mm, 12-10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Set\u003c\/th\u003e\n\u003ctd\u003e1 Pcs, 2 Pcs, or 5 Pcs (select variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Hose Types\u003c\/th\u003e\n\u003ctd\u003eFlexible rubber, silicone, PVC tubing (matching ID required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eFuel lines, air lines, coolant hoses, water tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eClamp Required\u003c\/th\u003e\n\u003ctd\u003eRecommended for pressurized systems (hose clamp sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Rating\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ Contact us to confirm for your application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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 for my hose connection?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the \u003cstrong\u003einner diameter (ID)\u003c\/strong\u003e of your hose — not the outer diameter. For a straight equal connection, select the matching single size (e.g., 8mm for an 8mm ID hose). For a reducing connection, select the format \u003cem\u003elarger–smaller\u003c\/em\u003e (e.g., 10-6mm means the larger barb is 10mm and the smaller is 6mm). Quick reference: 6mm ≈ 1\/4\", 8mm ≈ 5\/16\", 10mm ≈ 3\/8\", 12mm ≈ 1\/2\", 16mm ≈ 5\/8\", 19mm ≈ 3\/4\".\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat pressure can these brass barb fittings handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBrass barb fittings of this type are generally rated for low-to-medium pressure applications — typically up to 150 PSI in standard configurations, though the actual rating depends on hose type, clamp method, fluid temperature, and installation quality. Always verify with your system's pressure requirements before use in critical applications.\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\u003eBrass offers good corrosion resistance in most indoor and mild outdoor environments and is generally compatible with fuel, water, and compressed air. It is not recommended for highly acidic or alkaline fluids, or prolonged saltwater exposure. For harsh marine or chemical environments, stainless steel fittings are typically a better choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat hose types are compatible with these barb fittings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese fittings are generally compatible with flexible hoses including rubber fuel hose, silicone hose, PVC tubing, and reinforced air line hose. The barbed profile grips the hose inner wall; using a hose clamp over the barb is recommended for pressurized systems to ensure a leak-free, secure connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need a hose clamp with these fittings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor low-pressure or gravity-fed applications, the barb grip alone may hold adequately. For pressurized fuel, air, or fluid lines, a hose clamp over the barb is strongly recommended to prevent blow-off and maintain a leak-free seal over time. Hose clamps are sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between reducing sizes (e.g., 10-6mm) and single sizes (e.g., 10mm)?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eSingle sizes\u003c\/strong\u003e (e.g., 10mm) have both barbs the same diameter — used to join two hoses of equal inner diameter at a 90° angle. \u003cstrong\u003eReducing sizes\u003c\/strong\u003e (e.g., 10-6mm) have two different barb diameters — used to connect hoses of different inner diameters at a 90° angle, allowing you to step up or step down between hose sizes without a separate adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these fittings be used for coolant or water lines?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, brass barb fittings are generally suitable for water and coolant lines in automotive, HVAC, and general plumbing applications. Ensure the hose material is also rated for the fluid type and temperature range of your specific system before installation.\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":"6-4mm \/ 1 Pcs","offer_id":52331545297170,"sku":"GYZSYHYJJ02719x1","price":5.2,"currency_code":"USD","in_stock":true},{"title":"8-4mm \/ 1 Pcs","offer_id":52331545329938,"sku":"GYZSYHYJJ02720x1","price":5.2,"currency_code":"USD","in_stock":true},{"title":"8-6mm \/ 1 Pcs","offer_id":52331545362706,"sku":"GYZSYHYJJ02721x1","price":5.2,"currency_code":"USD","in_stock":true},{"title":"10-4mm \/ 1 Pcs","offer_id":52331545395474,"sku":"GYZSYHYJJ02722x1","price":5.62,"currency_code":"USD","in_stock":true},{"title":"10-6mm \/ 1 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