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Low-lead bronze 45-degree wye coupling with three sweat cup ends

Nibco, Inc.

Nibco, Inc. 749-LF 1 in 45 Deg Wye Coupling

SKU CH-02NK-VTBYT

Connects three 1-inch copper tubes at a 45-degree branch for potable water systems

  • Low-lead bronze for potable water safety
  • 45-degree wye design enables smooth flow diversion
  • Sweat-cup connections on all three ends
  • 1-inch copper tube size fits standard plumbing
  • NIBCO brand trusted by plumbing professionals

Product Identity

The Nibco 749-LF is a 45-degree wye coupling made from low-lead cast bronze for potable-water systems. It joins three 1-inch copper tubes using sweat connections on every branch. Plumbers and contractors use it to split or combine flow in residential and commercial supply lines.

Upgrade Path

This fitting replaces older bronze or brass wyes that do not meet current low-lead requirements for drinking water. The jump is worth it when local codes mandate compliant alloys or when an existing tee creates turbulence that a 45-degree wye reduces. It is not for systems that require press, push-fit or threaded joints instead of soldered cups.

Installation Notes

Sweat each cup with standard flux and lead-free solder after cleaning and fluxing the tube ends. The 45-degree angle demands accurate tube alignment so the branches seat fully before heating. Common issues include insufficient cleaning that causes leaks, overheating that damages the low-lead alloy, and forgetting to support the completed assembly against movement.

Highlights

  • Low-lead bronze for potable water safety
  • 45-degree wye design enables smooth flow diversion
  • Sweat-cup connections on all three ends
  • 1-inch copper tube size fits standard plumbing
  • NIBCO brand trusted by plumbing professionals

Specifications

BrandNIBCO

Questions about this item

What copper tube size does the 749-LF 45-degree wye accept on each of its three cup connections?

Each cup connection is sized for 1 in copper tube, which has a 1 1/8 in outer diameter.

What is the correct sequence for sweat-soldering the three cup joints on this low-lead bronze wye?

Clean and flux all three tube ends and cup interiors, assemble the full joint, then apply heat evenly around each cup until solder flows into the full circumference.

How often should the soldered joints on a potable-water wye be inspected for leakage or corrosion?

Inspect all three sweat joints at least once a year and after any pressure test or water-quality change.

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