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Copper return bend fitting with cup connections

Nibco, Inc.

Nibco, Inc. 638 Return Bend Copper 11/2 in Cup 11/2 in FTG 11/2 in

SKU CH-B70D-M3466

A sweat fitting return bend for air, gases and potable water, rated to 577 psi at 200 °F and 400 °F maximum temperature

  • Handles high-pressure systems with 577 psi rating
  • Withstands extreme heat up to 400 Degrees F
  • Fits 1 1/2 in copper tubing securely
  • Sweat connection ensures leak-resistant joints
  • Durable wrot copper construction for long service life

1 1/2 in Copper Return Bend

This NIBCO 638 wrot copper return bend joins two 1 1/2 in copper tubes using cup connections on both ends. It is rated for air, gases and potable water systems. The fitting handles a maximum operating pressure of 577 psi at 200 degrees F and a maximum temperature of 400 degrees F.

Sweat connection readiness

The cup ends require sweat soldering with appropriate flux and lead-free solder for potable water. No press tools, crimp rings or threaded adapters are included. Installers must supply pipe, cleaning abrasives, flux and solder to complete the joint.

System pressure and temperature check

Verify that the piping system design pressure does not exceed 577 psi at 200 degrees F and that operating temperatures stay within the 400 degree F limit. Confirm local code acceptance for wrot copper sweat fittings in the intended application before ordering.

Highlights

  • Handles high-pressure systems with 577 psi rating
  • Withstands extreme heat up to 400 Degrees F
  • Fits 1 1/2 in copper tubing securely
  • Sweat connection ensures leak-resistant joints
  • Durable wrot copper construction for long service life

Specifications

BrandNIBCO

Questions about this item

Will the copper return bend need replacement due to corrosion or wear?

Wrot copper resists corrosion in potable water and gas lines, so the fitting itself does not require scheduled replacement under normal conditions.

What pressure limit applies when the system runs continuously at high temperature?

The maximum operating pressure is 577 psi at 200 degrees F, which is the limiting factor during sustained hot‑water or steam service.

Does the fitting generate noise or heat during all‑day operation?

As a passive sweat fitting it produces no noise or heat of its own; any temperature rise comes from the fluid inside, up to a 400 degree F rating.

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