We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Copper reducing adapter with sweat and threaded ends

Nibco, Inc.

Nibco, Inc. U603 1/2x1/4 Copper Reducing Adapter Trap

SKU CH-1CW7-0XNNB MPN U603

A sweat fitting adapter joining 1/2 inch copper tube to 1/4 inch FNPT, rated for 722 psi at 100 degrees F and 400 degrees F maximum temperature

  • TypeDrain Components
  • MaterialHAWA
  • Reduces 1/2" copper tube to 1/4" FNPT for versatile plumbing connections
  • Wrot copper construction handles 722 psi at 100 Degrees F for reliable pressure performance
  • Rated to 400 Degrees F maximum operating temperature for hot water and heating applications
  • Sweat fitting design enables secure soldered joints on the copper side
  • Suitable for air, gases and potable water systems across multiple installations

Copper Reducing Adapter for 1/2" to 1/4" Connections

This NIBCO U603 reducing adapter joins a 1/2 inch copper tube to a 1/4 inch female NPT thread. The wrot copper body suits potable water, air and gas lines. It is rated for 722 psi at 100 degrees F and 400 degrees F maximum temperature. Installers who need a sweat-to-thread transition in a single fitting will use this part.

Verify Tube Size and Thread Type Before Ordering

Confirm the existing copper tube has a 5/8 inch outer diameter to match the 1/2 inch nominal sweat end. Ensure the mating component uses a 1/4 inch male NPT thread. Check that system pressure and temperature stay within the 722 psi and 400 degrees F limits. This adapter is not for larger tube sizes, different thread standards or press-fit connections.

Sweats Into Copper Systems

The cup end sweats directly onto 1/2 inch copper tubing using standard solder techniques. The FNPT end accepts 1/4 inch male pipe threads from valves, gauges or equipment. Wrot copper construction resists corrosion in potable water, air and gas service. The reducing design eliminates separate bushings or couplings, saving space and potential leak paths.

Highlights

  • Reduces 1/2" copper tube to 1/4" FNPT for versatile plumbing connections
  • Wrot copper construction handles 722 psi at 100 Degrees F for reliable pressure performance
  • Rated to 400 Degrees F maximum operating temperature for hot water and heating applications
  • Sweat fitting design enables secure soldered joints on the copper side
  • Suitable for air, gases and potable water systems across multiple installations

Specifications

TypeDrain Components
MaterialHAWA
BrandNibco
ModelU603 1/2x1/4

Questions about this item

Does the Nibco U603 reducing adapter include any solder or flux for the sweat connection?

The fitting is supplied as a single wrot-copper reducing adapter; solder, flux and any pipe are not included and must be purchased separately.

Should I choose the 1/2" C x 1/4" FNPT version or a different size for my 1/2" copper tube?

This model is specifically a 1/2" nominal copper sweat end reducing to a 1/4" FNPT thread; select it only when that exact transition is required.

What does the 722 psi rating at 100 Degrees F mean for a potable-water installation?

It indicates the maximum continuous operating pressure the adapter can withstand at that temperature; system pressure must stay below 722 psi at 100 Degrees F.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.