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Copper reducing adapter, 2 inch by 1-1/2 inch, wrot copper finish

Nibco, Inc.

Nibco, Inc. 603R 2x11/2 Copper Reducing Adapter trap

SKU CH-FMSB-97XTF MPN 603R

Copper reducing adapter joins a 2-inch tube to a 1-1/2-inch pipe thread, rated to 364 psi at 100 degrees F

  • TypeDrain Components
  • MaterialHAWA
  • Copper construction resists corrosion for long service life
  • Reduces 2 in tube to 1-1/2 in FNPT in one fitting
  • Rated to 364 psi at 100 Degrees F for demanding systems
  • Operates from -20 to 400 Degrees F across wide temperature range
  • Meets ASME/ANSI B 16.22 standard for reliable performance

Product Identity

The Nibco 603R is a wrot-copper reducing adapter that joins a 2-inch copper tube to a 1-1/2-inch female NPT thread. It serves plumbers and maintenance crews who need a pressure-rated transition in water, heating or compressed-air systems.

Installation Checklist

Verify that the existing copper tube measures 2 inches outside diameter and that the mating port provides a 1-1/2-inch female NPT thread. Confirm the system design pressure stays at or below 364 psi at 100 degrees F and that operating temperatures remain between -20 and 400 degrees F. Ensure solder materials and flux are compatible with wrot copper and that the joint orientation allows proper capillary flow.

Thermal and Pressure Behaviour

The fitting is rated for continuous service up to 400 degrees F and withstands 364 psi at 100 degrees F per ASME B16.22. Copper construction transfers heat rapidly, so adjacent insulation may be required to control surface temperature or prevent condensation. No moving parts or seals generate noise; pressure drop across the reducer is negligible in typical drain or supply applications.

Highlights

  • Copper construction resists corrosion for long service life
  • Reduces 2 in tube to 1-1/2 in FNPT in one fitting
  • Rated to 364 psi at 100 Degrees F for demanding systems
  • Operates from -20 to 400 Degrees F across wide temperature range
  • Meets ASME/ANSI B 16.22 standard for reliable performance

Specifications

TypeDrain Components
MaterialHAWA
BrandNibco
Model603R 2x11/2

Questions about this item

Does the 603R reducing adapter come with any sealant or gaskets, or must I buy them separately?

The 603R is supplied as a single wrot copper fitting with a C x FNPT connection; thread sealant or tape for the 1-1/2 in FNPT end is not included and must be purchased separately.

When should I choose the 2 in C x 1-1/2 in FNPT version instead of another size?

Select this 603R model when you need to join a 2 in nominal copper tube to a 1-1/2 in female pipe thread in a drainage system.

What does the 364 psi at 100 °F rating mean for everyday drainage use?

It indicates the adapter can withstand 364 psi at 100 °F, well above typical residential drainage pressures, and it remains rated from -20 °F to 400 °F per ASME B16.22.

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