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Small copper return bend coupling with two cup ends

Nibco, Inc.

Nibco, Inc. 638 1/8 Return Bend Copper Coupling

SKU CH-98NB-NM8TR

A 1/8-inch copper return-bend sweat fitting rated for 729 psi at 200 °F and 400 °F maximum temperature

  • Return bend shape redirects piping in compact layouts
  • Wrot copper construction resists corrosion in potable water systems
  • Sweat cup connections create permanent leak-free joints
  • Rated for 729 psi at 200°F in air, gas and water lines
  • Withstands continuous temperatures up to 400°F for demanding installations

Copper Return Bend for 1/8 in Tubing

This wrot copper return bend connects two 1/8 inch copper tubes using cup-to-cup sweat joints. It is designed for air, gases and potable water lines in plumbing and light industrial systems. The fitting carries the NIBCO brand and is supplied new.

729 psi at 200 Degrees F Pressure Rating

The maximum operating pressure of 729 psi at 200 degrees Fahrenheit determines whether this return bend suits the intended service conditions. It also withstands temperatures up to 400 degrees Fahrenheit. Select this part only when the system design stays within both limits.

No Additional Accessories Included

The product ships as a single fitting without flux, solder or installation tools. The installer must provide compatible materials for sweat joining. Orders of 75 dollars or more from the supplier qualify for free shipping, but that threshold is a commercial term, not a product attribute.

Highlights

  • Return bend shape redirects piping in compact layouts
  • Wrot copper construction resists corrosion in potable water systems
  • Sweat cup connections create permanent leak-free joints
  • Rated for 729 psi at 200°F in air, gas and water lines
  • Withstands continuous temperatures up to 400°F for demanding installations

Specifications

BrandNIBCO

Questions about this item

What does the 729 psi rating mean when the fitting is installed in a copper plumbing system?

The fitting is rated to withstand up to 729 psi at 200 °F, so it will handle typical residential and light-commercial water pressures with a wide safety margin.

What connection standard does the cup end follow, and what tube size does it accept?

Each end is a sweat cup for 1/8 in copper tube size, which corresponds to 1/4 in tube outer diameter, and is joined by soldering to standard Type K, L or M copper tubing.

What physical space is needed to fit the return bend into a piping run?

The return bend reverses direction in a single plane, so you need enough straight run on each side to make two sweat joints and accommodate the U-shaped centre-to-centre lay length of the fitting.

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