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Copper reducing adapter with sweat and threaded ends

Nibco, Inc.

Nibco, Inc. 603-R Copper Reducing Adapter

SKU CH-9H44-0WFJP

A sweat fitting adapter joining 1 1/2 in copper tube to 1 1/4 in FNPT, rated 408 psi at 100 Degrees F and 400 Degrees F maximum temperature

  • Connects 1-1/2" copper tube to 1-1/4" FNPT threads
  • Wrot copper construction handles 408 psi at 100°F
  • Rated for 400°F maximum operating temperature
  • Suitable for air, gases and potable water systems
  • Sweat fitting design enables secure soldered joints

1-1/2" C x 1-1/4" FNPT Reducing Adapter

This Nibco 603-R copper reducing adapter connects a 1-1/2 inch nominal copper tube on the sweat side to a 1-1/4 inch female NPT thread on the other. It is made from wrought copper and suits air, gases and potable water systems. Installers use it to step down pipe size while changing connection method in a single fitting. The component is supplied new and ready for installation.

Thermals, noise and power draw

The adapter is a passive metal fitting with no moving parts, electrical supply or active cooling, so it produces no noise and draws no power. It is rated for a maximum operating temperature of 400 degrees Fahrenheit and a maximum operating pressure of 408 psi at 100 degrees Fahrenheit. Performance within these limits depends on correct joint preparation and the surrounding pipework. No thermal or acoustic data applies beyond these ratings.

Bundled accessories and software

No accessories, sealants, tools or software are included with the fitting. The installer must supply flux, solder, thread sealant and any required pipe or tubing separately. Because nothing is bundled, the purchase decision rests only on the fitting itself and its pressure and temperature ratings. Compliance with local plumbing codes remains the responsibility of the installer.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $20.99
Pricier than about 55% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameNIBCO

Questions about this item

How do I install the 1-1/2" copper sweat end onto the tube without leaks?

Clean the tube and fitting with emery cloth, apply flux, slide the cup over the tube, then heat evenly with a torch until solder flows into the joint.

Will the wrot copper body or FNPT threads need periodic replacement?

The wrot copper body resists corrosion in potable water and air systems; inspect FNPT threads for scale or damage during routine system checks.

At what temperature does the adapter reach its 408 psi pressure limit?

The 408 psi rating applies at 100°F; at the maximum 400°F operating temperature the allowable pressure is lower.

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