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Copper reducing adapter with sweat and threaded ends

Nibco, Inc.

Nibco, Inc. 604R 1" C x 1/2" MNPT Copper Adapter

SKU CH-BFYY-R9NRK

A reducing sweat adapter joining 1-inch copper tube to 1/2-inch male NPT threads, rated to 395 psi at 200 °F and 400 °F maximum temperature

  • Reducing adapter connects 1 in copper to 1/2 in MNPT threads
  • Wrot copper construction handles potable water, air and gas lines
  • Rated 395 psi at 200 °F for high-pressure service
  • Withstands temperatures up to 400 °F in demanding systems
  • Sweat cup on one end, male NPT on the other

1" C x 1/2" MNPT Reducing Adapter

This NIBCO 604R adapter connects a 1 inch copper tube to a 1/2 inch male NPT thread. It is made from wrot copper for use with air, gases, or potable water systems. The fitting reduces from a 1 1/8 inch outer diameter on the sweat side to a 5/8 inch outer diameter on the threaded side. It suits plumbers joining dissimilar pipe sizes in residential or commercial installations.

Sweat Installation Requires Flux and Torch

The cup end must be cleaned, fluxed, and heated evenly before applying lead-free solder for a watertight joint. Overheating can damage the copper or burn the flux, while insufficient heat leaves voids in the joint. The MNPT side needs thread sealant or tape applied to the male threads before tightening into the female fitting. Misaligned pipes stress the joint and cause leaks over time.

Rated for 395 psi at 200 Degrees F

The adapter withstands a maximum operating pressure of 395 psi at 200 degrees Fahrenheit and handles temperatures up to 400 degrees Fahrenheit. Copper construction maintains strength during sustained pressure and thermal cycling in hot water lines. The reducing shape maintains flow characteristics while transitioning between the two nominal sizes without restricting the system.

Highlights

  • Reducing adapter connects 1 in copper to 1/2 in MNPT threads
  • Wrot copper construction handles potable water, air and gas lines
  • Rated 395 psi at 200 °F for high-pressure service
  • Withstands temperatures up to 400 °F in demanding systems
  • Sweat cup on one end, male NPT on the other

Specifications

BrandNIBCO

Questions about this item

How can I verify the adapter is holding pressure after soldering the 1 in copper cup end?

Pressure-test the joint up to 395 psi at 200 °F; a leak-free hold confirms the sweat connection and MNPT threads are sealing correctly.

What comes in the box and do I need to buy solder, flux or thread sealant separately?

The box contains only the wrot copper reducing adapter; solder, flux and pipe-thread sealant for the 1/2 in MNPT end must be purchased separately.

Which NIBCO 604R size should I choose for a 1 in copper line reducing to a 1/2 in male pipe thread?

Select the 604R 1 in C x 1/2 in MNPT model — its cup fits 1 1/8 in OD copper tube and its threads match 1/2 in NPT pipe.

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