{"product_id":"copper-straight-pipe-extension-joint-flare-nuts","title":"Copper Straight Pipe Extension Joint with Flare Nuts 1\/4\"–3\/4\"","description":"\n\u003ch2\u003eCopper Straight Pipe Extension Joint with Flare Nuts\u003c\/h2\u003e\n\u003cp\u003eConnect copper pipes quickly and securely — no welding required. These premium solid copper straight pipe extension joints are engineered for professional-grade performance across a wide range of applications, from air conditioning and refrigeration systems to plumbing, fuel lines, and medical oxygen pipes. Available in multiple sizes (1\/4\", 3\/8\", 1\/2\", 5\/8\", and 3\/4\"), these fittings are a versatile must-have for HVAC technicians, plumbers, and DIY enthusiasts alike.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePremium Solid Copper Construction:\u003c\/strong\u003e Crafted from high-quality solid copper for outstanding durability, natural corrosion resistance, and long-lasting anti-rust performance — built to stand the test of time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo-Weld Connection:\u003c\/strong\u003e The flare nut design allows you to join two copper pipes cleanly and confidently without any welding equipment, saving time and effort on every installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application Range:\u003c\/strong\u003e Ideal for air conditioning branch pipes, refrigeration equipment, ship piping systems, copper water pipes, medical oxygen lines, fuel and gas systems, plumbing, and vacuum applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple Size Options:\u003c\/strong\u003e Compatible with copper pipes in 1\/4\" (6.35 mm), 3\/8\" (9.53 mm), 1\/2\" (12.7 mm), 5\/8\", and 3\/4\" diameters, making these fittings highly versatile across a variety of setups.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Pressure Rated:\u003c\/strong\u003e Rated to a maximum pressure of 229 PSI (1.6 MPa \/ ≥850 kPa), ensuring a reliable, leak-free seal even under demanding conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature Range:\u003c\/strong\u003e Performs reliably from -20°C to 120°C (-4°F to 248°F), suitable for both cold refrigeration and hot-water applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlange-Type Fitting:\u003c\/strong\u003e The flange connection type provides a secure, stable joint that is easy to tighten and resistant to loosening over time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSolid Copper \/ Brass\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFlare \/ Flange\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable Sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/4\", 3\/8\", 1\/2\", 5\/8\", 3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e229 PSI \/ 1.6 MPa (≥850 kPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20°C to 120°C (-4°F to 248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAir conditioning and HVAC branch pipe connections\u003c\/li\u003e\n  \u003cli\u003eRefrigeration equipment and cold-line systems\u003c\/li\u003e\n  \u003cli\u003eResidential and commercial plumbing\u003c\/li\u003e\n  \u003cli\u003eFuel and gas line systems\u003c\/li\u003e\n  \u003cli\u003eVacuum system connections\u003c\/li\u003e\n  \u003cli\u003eShip and marine piping\u003c\/li\u003e\n  \u003cli\u003eMedical oxygen pipe systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What sizes are available for these copper straight pipe extension joints?\u003c\/h4\u003e\n\u003cp\u003eA: These copper pipe extension joints are available in five sizes: 1\/4\" (6.35 mm), 3\/8\" (9.53 mm), 1\/2\" (12.7 mm), 5\/8\", and 3\/4\". This range of sizes makes them suitable for a wide variety of HVAC, refrigeration, and plumbing applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do these fittings require welding to install?\u003c\/h4\u003e\n\u003cp\u003eA: No — these flare nut copper connectors are specifically designed to connect two copper pipes without any welding. The flare-type connection provides a secure, leak-resistant joint using only standard hand tools, making installation fast and straightforward.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum pressure rating for these copper pipe fittings?\u003c\/h4\u003e\n\u003cp\u003eA: These fittings are rated to a maximum pressure of 229 PSI (1.6 MPa \/ ≥850 kPa), making them suitable for use in pressurized refrigeration, plumbing, fuel, and gas systems.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are these fittings suitable for air conditioning and refrigeration systems?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. These straight pipe extension joints are widely used in air conditioning branch pipes and refrigeration equipment. Their solid copper construction and high-pressure rating make them an excellent choice for both residential and commercial HVAC and refrigeration setups.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What sizes are available for these copper straight pipe extension joints?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These copper pipe extension joints are available in five sizes: 1\/4\\\" (6.35 mm), 3\/8\\\" (9.53 mm), 1\/2\\\" (12.7 mm), 5\/8\\\", and 3\/4\\\". 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