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Copper reducing adapter, sweat cup to female NPT, wrot copper finish

Nibco, Inc.

Nibco, Inc. 9025660 603-R 1-1/4" C x 1" FNPT Copper Reducing Adapter

SKU CH-54D7-YSD1Q MPN 9025660

Connects 1-1/4" copper tube to 1" FNPT thread, rated 439 psi at 100°F and 400°F max temperature

  • Product typeDrain Components
  • Reducing adapter connects 1-1/4" copper tube to 1" FNPT thread
  • Wrot copper construction resists corrosion in potable water and gas lines
  • Sweat fitting design creates permanent leak-tight joints when soldered properly
  • Rated 439 psi at 100°F for high-pressure residential and commercial systems
  • Withstands 400°F maximum operating temperature for hot water applications

Product Identity

This NIBCO 603-R reducing adapter joins 1-1/4 inch copper tubing to a 1 inch female NPT thread in potable water, air or gas lines. It is built for plumbers and maintenance crews who need a reliable sweat-to-thread transition in residential or light commercial systems.

Build Integration

The wrot copper body sweats onto the tube side while the FNPT end accepts standard iron pipe threads, so no special tools beyond a torch and flux are required. It removes the need for a separate coupling and bushing, saving space and potential leak points in tight mechanical rooms.

Capacity and Limits

Rated for 439 psi at 100 degrees F and 400 degrees F maximum temperature, the fitting handles typical hot and cold distribution pressures with margin. It is not suited for steam service above the temperature limit or for systems that exceed the stated pressure rating.

How it compares

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

Price $18.99
Cheaper than about 67% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameNibco
Model name9025660
Product typeDrain Components

Questions about this item

What is the maximum operating pressure the adapter can handle at 100 Degrees F?

The adapter is rated for a maximum operating pressure of 439 psi at 100 Degrees F.

What is the maximum operating temperature this copper reducing adapter can withstand?

The fitting has a maximum operating temperature rating of 400 Degrees F.

What pipe sizes and connection types are required to install this reducing adapter?

It connects a 1-1/4 inch copper tube sweat fitting on Side A to a 1 inch FNPT threaded pipe on Side B.

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