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Straight copper adapter with sweat cup and male pipe thread ends

Nibco, Inc.

Nibco, Inc. 904 1-1/4" C x 1-1/4" MNPT Copper Adapter

SKU CH-TAVM-TVEHT

Copper sweat adapter joins 1-1/4 inch tube to 1-1/4 inch male pipe thread for air or potable water systems up to 400 degrees F

  • Connects copper tube to male NPT threads via sweat joint
  • Rated for 400 °F maximum operating temperature
  • Meets ASME B16.29, ASTM B75 and ISO 9001 standards
  • Wrot copper construction for potable water and air lines
  • Straight adapter joins 1 1/4 in copper tube to 1 1/4 in pipe

NIBCO 904 Copper Sweat Adapter

The NIBCO 904 is a straight sweat fitting adapter made from wrot copper. It connects a 1-1/4 inch copper tube to a 1-1/4 inch male NPT thread for air or potable water lines. The fitting meets ASME B 16.29, ASTM B75 and ISO 9001 standards.

Installers joining copper tube to threaded pipe

This adapter suits plumbers and HVAC technicians who need a permanent sweat connection on one end and a threaded transition on the other. It is not for installers who require a press-fit, push-to-connect or flare joint, nor for systems exceeding the rated pressure or temperature limits.

Sweat installation requires flux, solder and heat

Clean the tube end and fitting cup thoroughly, apply flux, insert the tube and heat the joint evenly until solder flows into the cup. Overheating can damage the copper or nearby components, while insufficient heat leaves voids that leak under pressure. Thread sealant is needed on the MNPT side.

Highlights

  • Connects copper tube to male NPT threads via sweat joint
  • Rated for 400 °F maximum operating temperature
  • Meets ASME B16.29, ASTM B75 and ISO 9001 standards
  • Wrot copper construction for potable water and air lines
  • Straight adapter joins 1 1/4 in copper tube to 1 1/4 in pipe

Specifications

BrandNIBCO

Questions about this item

What copper tube size must the installer already have on hand to sweat this 904 adapter?

The cup end is made for 1 1/4 in copper tube size, so that exact tubing must be available for the sweat joint.

Will the 1 1/4 in MNPT threads on this adapter mate with existing 1 1/4 in NPT fittings in the system?

Yes, the male NPT threads follow ASME B 16.29 and are sized for 1 1/4 in pipe, matching standard NPT components.

How can the installer confirm the joint is sound after soldering the cup and threading the MNPT end?

Pressurise the line up to the 5 psi maximum operating pressure and inspect both the sweat and threaded connections for leaks.

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