Our equal elbow copper tube fittings are engineered for reliable 90° connections in HVAC/R systems, refrigeration pipelines, and plumbing installations. Made from seamless high-grade copper, these elbows ensure excellent corrosion resistance, pressure durability, and ease of installation by brazing or soldering. With smooth internal surfaces, they minimize flow resistance and extend service life.
Copper Tube Fittings Size Conversion Chart (mm ⇄ inch)
Size (mm) Size (inch) Common Application
6 mm 1/4” Capillary tubes, small refrigeration lines
8 mm 5/16” Refrigeration control lines
10 mm 3/8” Small refrigeration & plumbing
12 mm 1/2” Residential plumbing, small AC units
15 mm 5/8” HVAC/R, plumbing, residential hot/cold water
18 mm 3/4” HVAC/R, medium-size AC, refrigeration
22 mm 7/8” HVAC main lines, refrigeration pipelines
28 mm 1-1/8” HVAC & plumbing trunk lines
35 mm 1-3/8” Commercial HVAC systems
42 mm 1-5/8” Large AC, refrigeration condensers
54 mm 2-1/8” Industrial refrigeration & chilled water
67 mm 2-5/8” Central HVAC systems, industrial applications
76 mm 3” Large HVAC pipelines
80 mm 3-1/8” Industrial refrigeration
89 mm 3-1/2” Chillers, central HVAC systems
108 mm 4-1/8” Large refrigeration & plumbing mains
133 mm 5-1/4” Industrial HVAC pipelines
159 mm 6-1/4” Heavy-duty industrial refrigeration
• Material: Premium seamless copper
• Type: Equal elbow (both ends same diameter)
• Angle: 90° bend
• Applications: HVAC/R systems, refrigeration units, air conditioning, and plumbing pipelines
• Features: Leak-proof connection, durable, easy installation
• Standards: ASTM B280/B88, EN 1057, JIS H3300 compliant
• Customization: Additional sizes, wall thickness, and OEM/ODM packaging available upon request Notes for Customers
1. Equal Elbows use the same size on both ends (e.g., 22mm = both ends 22mm).
2. Reducing Elbows will be marked as two sizes (e.g., 22mm × 18mm).
3. Most popular international sizes: 15mm (1/2”), 18mm (5/8”), 22mm (7/8”), 28mm (1-1/8”).
4. Larger diameters (≥ 35mm) are mainly for commercial & industrial HVAC systems.
It connects two copper pipes of the same diameter at a 90° angle, commonly used in HVAC, refrigeration, and plumbing systems.
We supply standard international sizes: 15mm (1/2”), 18mm (5/8”), 22mm (7/8”), and 28mm (1-1/8”).
Yes, customization is available. We can provide additional diameters, wall thickness, and OEM/ODM packaging.
Our fittings meet ASTM B280/B88, EN 1057, and JIS H3300 international standards.
They are typically installed by brazing or soldering, ensuring a secure, leak-proof connection.