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Copper reducing adapter, three-quarter by half inch, model 603

Nibco, Inc.

Nibco, Inc. C603 Reducing Adapter 3/4 x 1/2 In Copper trap

SKU CH-9TYE-WH856 MPN C603

Copper reducing adapter joins 3/4 inch to 1/2 inch tubing in drain systems

  • TypeDrain Components
  • Copper construction resists corrosion for long service life
  • Reducing adapter connects 3/4 inch to 1/2 inch tubing
  • Adapter fitting simplifies pipe size transitions
  • Durable copper material handles pressure and temperature changes
  • Nibco model 603 ensures reliable plumbing connections

Copper Reducing Adapter

The Nibco C603 is a copper reducing adapter built to join a 3/4 inch tube to a 1/2 inch tube in plumbing systems. It functions as a drain component that provides a secure, leak-resistant transition between two different pipe diameters. The copper construction offers durability and flexibility for long-term service in residential or commercial installations. This fitting is supplied new and ready for immediate use.

Installers needing a single size transition

Plumbers and maintenance technicians who need to reduce a 3/4 inch copper line down to a 1/2 inch copper line will find this adapter fits the task. It is not intended for connections that require a different reduction ratio, a different pipe material, or a fitting style other than a reducing adapter. Buyers who need multiple transitions or a different fitting shape should look at other components.

Reducing adapter tube sizes

The defining specification is the tube size reduction from 3/4 inch to 1/2 inch in a copper reducing adapter. This exact size pairing determines whether the part matches the piping layout. Confirm the required reduction before purchase.

Highlights

  • Copper construction resists corrosion for long service life
  • Reducing adapter connects 3/4 inch to 1/2 inch tubing
  • Adapter fitting simplifies pipe size transitions
  • Durable copper material handles pressure and temperature changes
  • Nibco model 603 ensures reliable plumbing connections

Specifications

TypeDrain Components
BrandNibco
ModelC603 3/4x1/2

Questions about this item

What copper pipe sizes must I already have to connect this 3/4 x 1/2 inch reducing adapter?

You need one length of 3/4 inch copper tube and one length of 1/2 inch copper tube, both cut square and deburred, ready for sweat soldering.

Will this adapter fit onto the existing 1/2 inch copper drain line I plan to keep?

Yes, the 1/2 inch end of the adapter slips over standard 1/2 inch copper tube so it joins directly to your current drain line.

After soldering, how can I confirm the joint is watertight?

Pressurise the line with water, inspect the solder fillet all round both hubs, and watch for any seepage over several minutes.

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