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Copper reducing adapter with threaded and smooth ends

Nibco, Inc.

Nibco, Inc. 604R Reducing Adapter 1-1/2 in CxMNPT HAWA trap

SKU CH-QFX8-ZMVV7 MPN 604R

A copper reducing adapter joining 1-1/2 in tube to 1 in male pipe thread, rated 408 psi at 100 °F

  • Product typeDrain Components
  • Main materialHAWA
  • Reducing adapter connects 1-1/2 in tube to 1 in pipe
  • Wrot copper construction handles 408 psi at 100 Degrees F
  • Operates reliably from -20 Degrees to 400 Degrees F
  • Complies with ASME/ANSI B 16.22 standard
  • C x MNPT connection simplifies installation

1-1/2 in CxMNPT Reducing Adapter

This Nibco 604R reducing adapter joins a 1-1/2 inch copper tube to a 1 inch male NPT thread. It is made from wrot copper rated to 408 psi at 100 degrees Fahrenheit. The fitting meets ASME/ANSI B 16.22 standards for plumbing installations.

Suited for copper-to-thread transitions

Plumbers connecting copper tube to threaded pipe in hot or cold water systems will find this adapter matches the required diameter step-down. It is not for press-fit or push-fit systems that lack male NPT threads. Installers needing a different tube or pipe diameter must select another fitting.

408 psi pressure rating at 100 degrees F

The maximum working pressure of 408 psi at 100 degrees Fahrenheit determines whether this adapter suits the system design. Operating above this pressure or outside the -20 to 400 degree Fahrenheit temperature range risks joint failure. Verify the system pressure before specifying this part.

How it compares

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

Price $21.99
Cheaper than about 62% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameNibco
Model name604R 11/2 × 1
Product typeDrain Components
Size & build
Main materialHAWA

Questions about this item

What tube size must my existing copper pipe be to accept the 1-1/2 in CxMNPT connection?

The adapter fits a 1-1/2 in tube size on the copper side, so your existing pipe must match that outside diameter.

Will the 1 in MNPT thread mate with my older 1 in female threaded fitting?

Yes, the male NPT end is 1 in and follows ASME/ANSI B16.22, so it threads into any standard 1 in female NPT fitting.

How can I verify the joint is sound after soldering and threading?

Pressure-test up to 408 psi at 100 °F and check for leaks; the fitting is rated from -20 °F to 400 °F.

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