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Copper reducing adapter with threaded and smooth ends

Nibco, Inc.

Nibco, Inc. 604R 1-1/4 CxMNPT Reducing Adapter Trap

SKU CH-03Z3-9JS19 MPN 604R

A wrot copper reducing adapter connects 1-1/4 inch tube to 1 inch male NPT threads, rated to 439 psi at 100 degrees F with a -20 to 400 degree F range

  • Product typeDrain Components
  • Main materialHAWA
  • Reduces pipe size with secure C x MNPT connection
  • Wrot copper construction resists corrosion across wide temperature range
  • Rated 439 psi at 100 °F for reliable high-pressure service
  • Operates from -20 °F to 400 °F for versatile installations
  • Meets ASME/ANSI B16.22 standard for quality assurance

Reducing Adapter for Copper Piping

The Nibco 604R is a wrot copper reducing adapter that joins a 1-1/4 inch tube to a 1 inch male NPT thread. It is rated for 439 psi at 100 degrees F and operates from -20 to 400 degrees F. The fitting meets ASME/ANSI B 16.22 standards for plumbing installations.

Replaces Loose or Mismatched Threaded Joints

Use this adapter when a direct C x MNPT transition is required instead of piecing together separate couplings and bushings. The jump is worth it when the system demands a single pressure-rated fitting that covers the full -20 to 400 degrees F range without additional seal points.

Suits Copper Tube Installations Needing a 1-1/4

Plumbers working to ASME/ANSI B 16.22 specifications will find the correct size and pressure class here. Builders who need a different tube size, a female thread, or a non-copper material should look at other fitting types.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 80% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameNibco
Model name604R 11/4 × 1
Product typeDrain Components
Size & build
Main materialHAWA

Questions about this item

Will the 1-1/4 in C x 1 in MNPT adapter fit my copper tube and threaded pipe?

The fitting accepts 1-1/4 inch copper tube on the sweat end and 1 inch male NPT threads on the other, with an outside diameter of 1-3/8 in x 1 in.

How do I sweat the copper end without leaking?

Clean the tube and fitting, apply flux, heat evenly until solder flows into the joint, then let it cool undisturbed; the joint is rated to 439 psi at 100 Degrees F.

When should I replace this adapter?

Inspect for green corrosion, cracks or drips; the wrot copper body handles -20 to 400 Degrees F, so replace if the joint weeps or the threads strip.

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