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Copper reducing adapter, 3/4 by 1 inch, wrot copper finish

Nibco, Inc.

Nibco, Inc. C604 3/4x1 trap

SKU CH-H5WB-CHKSZ MPN C604

A copper reducing adapter joining 3/4 in tube to 1 in male pipe thread, rated to 582 psi at 100 Degrees F and serviceable from -20 Degrees to 400 Degrees F

  • TypeDrain Components
  • Reduces 3/4" copper tube to 1" male pipe thread
  • Wrot copper construction resists corrosion and handles 582 psi at 100 °F
  • Operates from -20 °F to 400 °F for hot and cold systems
  • Meets ASME/ANSI B16.22 standard for wrought copper fittings
  • Compact 7/8" x 1" outside diameter fits tight spaces

C x MNPT Reducing Adapter

The Nibco C604 is a wrot copper reducing adapter that joins a 3/4 inch nominal copper tube to a 1 inch male NPT thread. It is designed for drain component assemblies where a straight reduction between tube and pipe threads is required.

Check tube and thread compatibility

Verify that the existing line uses 3/4 inch nominal copper tubing and a 1 inch female NPT fitting before ordering. The adapter operates up to 582 psi at 100 degrees F and across a temperature range of -20 to 400 degrees F, so confirm the system pressure and temperature stay within those limits. Ensure the joint will meet ASME/ANSI B 16.22 requirements for the installation.

For copper-to-thread transitions

This adapter suits installers needing a direct copper-to-MNPT reduction in drain piping. It is not intended for larger tube sizes, different thread standards, or applications exceeding the stated pressure and temperature ratings. Builders requiring other diameters or connection types should select a different fitting.

Highlights

  • Reduces 3/4" copper tube to 1" male pipe thread
  • Wrot copper construction resists corrosion and handles 582 psi at 100 °F
  • Operates from -20 °F to 400 °F for hot and cold systems
  • Meets ASME/ANSI B16.22 standard for wrought copper fittings
  • Compact 7/8" x 1" outside diameter fits tight spaces

Specifications

TypeDrain Components
BrandNibco
ModelC604 3/4x1

Questions about this item

Does the C604 reducing adapter come with solder or thread sealant, or must I buy them separately?

The adapter is supplied as a single wrot copper fitting; solder and thread sealant are not included and must be purchased separately.

How do I choose between the C604 3/4x1 and other Nibco reducing adapters?

Select the C604 when you need a 3/4 inch nominal copper tube connection to a 1 inch male NPT thread; other models cover different tube and pipe size combinations.

What does the 582 psi rating mean when the fitting is installed in a hot water line?

The 582 psi maximum pressure applies at 100 °F; at higher temperatures up to 400 °F the allowable pressure is lower, so design the system accordingly.

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