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Straight copper union, bronze finish, 2 in sweat connections

Nibco, Inc.

Nibco, Inc. 733-LF 2 in Copper Union Bronze 291 psi NSF 61 372

SKU CH-13RE-0547E

A 2-inch straight copper union rated for 291 psi and 200 °F, meeting NSF/ANSI 61 and 372 standards for potable water

  • Lead-free bronze meets NSF/ANSI 61 for safe potable water
  • Rated 291 psi for reliable high-pressure performance
  • Withstands 200°F maximum operating temperature
  • Conforms to ASME B16.18 and ISO 9001 standards
  • Sweat copper connections simplify installation on 2 in tubing

Union for Potable Water Systems

This NIBCO 733-LF sweat fitting union joins two 2-inch copper tubes in potable water installations. The straight union design uses cup connections on both ends for secure soldered joints. Low-lead bronze construction meets NSF/ANSI 61 and NSF/ANSI 372 standards for drinking water safety.

Upgrading from Standard Brass Unions

The low-lead bronze body replaces traditional brass fittings where lead-free compliance is required by code. The jump is worth it when local regulations mandate NSF/ANSI 372 certification for potable water lines. ASME B16.18 compliance ensures dimensional interchangeability with existing copper piping systems.

Pressure and Temperature Headroom

Rated for 291 psi maximum operating pressure at 200 degrees Fahrenheit, this union handles typical residential and commercial water supply demands. The bronze material provides corrosion resistance for continuous potable water service. ISO 9001 manufacturing standards support consistent quality across installations.

Highlights

  • Lead-free bronze meets NSF/ANSI 61 for safe potable water
  • Rated 291 psi for reliable high-pressure performance
  • Withstands 200°F maximum operating temperature
  • Conforms to ASME B16.18 and ISO 9001 standards
  • Sweat copper connections simplify installation on 2 in tubing

Specifications

BrandNibco

Questions about this item

What copper tube size must the 2 in union sweat onto?

The union is made for 2 in copper tube, which has a 2 1/8 in outer diameter on both ends.

How do I install the union without damaging the bronze body?

Remove the union nut and tailpiece, sweat each cup onto the pipe, then reassemble the joint with the gasket seated and the nut hand-tight plus a quarter turn.

How often should I check or replace the internal gasket on a potable-water line?

Inspect the gasket annually; replace it if you see cracking, hardening or any weeping at the joint.

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