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Copper sweat union, straight coupling, cast copper finish

Value Brand

Value Brand 24W576 Copper Sweat Union 3 in Cup Coupling

SKU CH-A8NS-FKBR0

Connects two 3-inch copper tubes in a straight line with a sweat joint rated for 317 psi at 100 degrees F

  • Straight union design simplifies copper tubing alignment
  • Cast copper body handles 317 psi at 100 Degrees F
  • Sweat ends accept 3 1/8 in tube for leak-free joints
  • Rated to 400 Degrees F for hot-water service
  • New Zoro Select fitting ships ready to install

3-inch Copper Sweat Union

The Value Brand 24W576 is a straight copper union designed to join two 3-inch copper tubes in plumbing systems. It suits installers who need a permanent, leak-resistant joint for water or gas lines. The cast copper body handles pressure and temperature demands in residential and commercial tubing networks.

Sweat installation requires clean tube ends and flux

Slide each tube fully into the 3 1/8-inch cup ends, apply flux, and heat evenly with a torch until solder flows around the joint. Overheating can damage the copper or weaken the solder bond. Incomplete cleaning or insufficient flux are the most common causes of leaks after pressure testing.

Rated for 317 psi at 100 Degrees F

This pressure rating at the stated temperature is the key figure for deciding if the union matches the system design. The fitting also withstands up to 400 Degrees F, so verify both limits against the intended service conditions before purchase.

Highlights

  • Straight union design simplifies copper tubing alignment
  • Cast copper body handles 317 psi at 100 Degrees F
  • Sweat ends accept 3 1/8 in tube for leak-free joints
  • Rated to 400 Degrees F for hot-water service
  • New Zoro Select fitting ships ready to install

Specifications

BrandZORO SELECT

Questions about this item

How do I verify the 3 in copper sweat union holds pressure after soldering?

Pressurise the system to the working limit of 317 psi at 100 °F and inspect every joint for leaks; the cast copper body is rated to 400 °F maximum operating temperature.

What comes with the 24W576 coupling and what must I supply?

The package contains only the straight union with two 3 1/8 in cup ends; you must provide 3 in copper tube, flux, lead-free solder and a torch for the sweat connections.

Which size of this Zoro Select union matches my 3 in copper tubing?

Choose the 3 in cup × 3 in cup version — both ends accept 3 1/8 in outside-diameter tube, the only size offered for this model.

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