Copper Return Bend End Feed Fitting — Φ6mm to Φ76mm U-Bend Plumbing Connector

Match the fitting's outer diameter (Φ) to your copper pipe's nominal outside diameter. The center distance determines how far apart the two parallel pipe runs will sit — for example, a 25mm (≈1") center distance suits tightly spaced runs, while 200mm (≈7.9") suits wider loops. Measure the gap between your pipe centerlines before ordering to select the correct variant.

Thicker walls (e.g., 1.5mm or 2.2mm) generally provide greater pressure tolerance and are preferred for central heating systems or higher-pressure domestic water lines. Thinner walls (0.8mm–1mm) are typically sufficient for low-pressure or gravity-fed systems. Confirm with your system's pressure rating before selecting a variant.

Copper end feed fittings typically handle working pressures of 10–16 bar for standard domestic plumbing applications, though the exact rating varies by pipe size and wall thickness. For specific pressure requirements, please contact us with your selected size and wall thickness to confirm suitability.

Copper has naturally good corrosion resistance and is generally suitable for outdoor plumbing installations when properly installed and protected from mechanical damage. In areas with highly acidic water (low pH), consult a qualified plumber before use, as acidic water can accelerate copper corrosion over time.

Yes. The metric sizes (6mm, 8mm, 10mm, 12mm, 16mm, 22mm, 28mm, 35mm, 42mm, 54mm, 67mm, 76mm) align with EN 1057 copper tube standards commonly used in the UK and EU. The 12.7mm, 19mm, and 25.4mm sizes also correspond to common imperial-equivalent dimensions used in North America. If you are unsure, check your pipe's outside diameter with calipers before ordering.

End feed fittings are soldered (sweated) onto copper pipe using a torch, flux, and solder. Clean the pipe end and fitting socket with emery cloth, apply flux, insert the pipe fully into the socket, and apply heat until solder flows into the joint by capillary action. You will need a plumber's torch, lead-free solder, and flux. Always follow local plumbing codes and safety guidelines when soldering.

Yes. Copper is suitable for both hot and cold water supply lines as well as central heating and solar thermal systems. It is generally rated for temperatures up to approximately 110°C in standard plumbing applications, making it compatible with most domestic heating circuits.

Common conversions for reference: 6mm ≈ 1/4", 8mm ≈ 5/16", 10mm ≈ 3/8", 12.7mm = 1/2", 15mm ≈ 9/16" (note: 15mm metric ≠ 1/2" nominal in all standards), 19mm ≈ 3/4", 22mm ≈ 7/8", 25.4mm = 1", 28mm ≈ 1-1/8", 35mm ≈ 1-3/8", 42mm ≈ 1-5/8", 54mm ≈ 2-1/8", 67mm ≈ 2-5/8", 76mm ≈ 3". Always verify with your pipe's actual outside diameter measurement.