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Copper return bend fitting with cup connections

Nibco, Inc.

Nibco, Inc. U638 Return Bend 1/2 in Copper Cup 1/2 in FTG 1/2 in

SKU CH-NW45-9FMMR MPN U638

A 1/2 in wrot copper return bend with cup connections for air, gases and potable water, rated to 722 psi at 100 Degrees F and 400 Degrees F

  • TypeDrain Components
  • MaterialHAWA
  • Return bend shape redirects copper tubing in compact layouts
  • Wrot copper construction resists corrosion in potable water systems
  • Rated 722 psi at 100 °F for high-pressure supply lines
  • Withstands 400 °F maximum operating temperature for hot-water service
  • Cup-to-cup sweat connections fit 1/2 in copper tube on both ends

Fitting Purpose

This Nibco U638 return bend redirects copper tubing in plumbing and mechanical systems. It joins two 1/2-inch copper tube ends using sweat cup connections on both sides. The wrot copper construction suits air, gas and potable water lines.

Suitable Installations

The fitting handles pressures up to 722 psi at 100 Degrees F and temperatures up to 400 Degrees F. It is not intended for systems that exceed those limits or for tube sizes other than 1/2 inch. Installers needing a different angle or connection type should select another component.

Deciding Specification

The sweat cup-to-cup return bend configuration fixes the joint geometry and tube size. Verify that your design requires this exact shape and 1/2-inch copper tube compatibility before purchasing.

Highlights

  • Return bend shape redirects copper tubing in compact layouts
  • Wrot copper construction resists corrosion in potable water systems
  • Rated 722 psi at 100 °F for high-pressure supply lines
  • Withstands 400 °F maximum operating temperature for hot-water service
  • Cup-to-cup sweat connections fit 1/2 in copper tube on both ends

Specifications

TypeDrain Components
MaterialHAWA
BrandNibco
ModelU638 1/2

Questions about this item

What copper tube size does the 1/2 in return bend accept?

Each end is sized for 1/2 in copper tube with a 5/8 in outer diameter.

How is the sweat fitting installed, and what step is often missed?

Clean both tube ends and the cup interiors, apply flux, slide the fitting on, then heat evenly until solder flows into the joint; the step often missed is heating the fitting body, not just the tube, so solder wets both surfaces.

When should the fitting be inspected or replaced?

Inspect after any system pressure test above 722 psi at 100 Degrees F or if the joint sees temperatures near 400 Degrees F; replace if corrosion, cracking or leakage appears.

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