Copper Straight Pipe Extension Joint with Flare Nuts 1/4"–3/4"
Copper Straight Pipe Extension Joint with Flare Nuts 1/4"–3/4"
Copper Straight Pipe Extension Joint with Flare Nuts
Connect 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.
Made in Mainland China.
Key Features
- Premium Solid Copper Construction: 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.
- No-Weld Connection: 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.
- Wide Application Range: 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.
- Multiple Size Options: 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.
- High Pressure Rated: Rated to a maximum pressure of 229 PSI (1.6 MPa / ≥850 kPa), ensuring a reliable, leak-free seal even under demanding conditions.
- Wide Operating Temperature Range: Performs reliably from -20°C to 120°C (-4°F to 248°F), suitable for both cold refrigeration and hot-water applications.
- Flange-Type Fitting: The flange connection type provides a secure, stable joint that is easy to tighten and resistant to loosening over time.
Specifications
| Material | Solid Copper / Brass |
| Connection Type | Flare / Flange |
| Available Sizes | 1/4", 3/8", 1/2", 5/8", 3/4" |
| Max Pressure | 229 PSI / 1.6 MPa (≥850 kPa) |
| Operating Temperature | -20°C to 120°C (-4°F to 248°F) |
| Country of Origin | Mainland China |
Applications
- Air conditioning and HVAC branch pipe connections
- Refrigeration equipment and cold-line systems
- Residential and commercial plumbing
- Fuel and gas line systems
- Vacuum system connections
- Ship and marine piping
- Medical oxygen pipe systems
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Frequently Asked Questions
Q: What sizes are available for these copper straight pipe extension joints?
A: 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.
Q: Do these fittings require welding to install?
A: 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.
Q: What is the maximum pressure rating for these copper pipe fittings?
A: 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.
Q: Are these fittings suitable for air conditioning and refrigeration systems?
A: 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.
Production & Packaging Notice
To 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.