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Copper flush bushing, cylindrical with stepped ends, smooth metallic finish

Nibco, Inc.

Nibco, Inc. 618 2" x 1-1/2" Copper Flush Bushing

SKU CH-1DJF-5V5TV MPN 618

Connects 2-inch and 1-1/2-inch copper tubes in air, gas or potable-water systems at up to 364 psi

  • TypeDrain Components
  • MaterialHAWA
  • Handles high-pressure systems with 364 psi rating
  • Withstands 400 Degrees F for demanding applications
  • Wrot copper construction resists corrosion
  • Reduces 2 in to 1 1/2 in copper tube
  • Sweat fitting design ensures leak-free joints

Copper Flush Bushing 2" x 1-1/2

The NIBCO 618 is a sweat-type flush bushing made from wrot copper for plumbing and mechanical piping. It joins a 2-inch fitting-end tube to a 1-1/2-inch copper tube using soldered connections. The component handles air, gases and potable water in residential or light-commercial systems.

Fit-for-purpose and limits

Installers reducing a 2-inch copper line to 1-1/2-inch copper will find the correct nominal sizes and pressure rating here. The part is not suited for threaded, press-fit or push-to-connect joints, nor for applications that exceed 364 psi at 100 Degrees F or 400 Degrees F. Buyers needing a different reduction ratio or connection method should select another fitting.

Sweat-joint practicalities

Because both ends are plain copper sockets, the joint requires flux, lead-free solder and appropriate torch heat to form a leak-free seal. No gaskets, O-rings or mechanical fasteners are included or required. The flush profile keeps the interior bore smooth, reducing turbulence and debris build-up in drainage or supply lines.

Highlights

  • Handles high-pressure systems with 364 psi rating
  • Withstands 400 Degrees F for demanding applications
  • Wrot copper construction resists corrosion
  • Reduces 2 in to 1 1/2 in copper tube
  • Sweat fitting design ensures leak-free joints

Specifications

TypeDrain Components
MaterialHAWA
BrandNibco
Model618 2x11/2

Questions about this item

What size copper tube must I already have to connect the 2 in fitting side of this flush bushing?

You need a 2 in copper tube with a 2 1/8 in outer diameter to sweat onto the FTG end of the bushing.

Will this 2 in by 1 1/2 in bushing join directly to my existing 1 1/2 in copper pipe without an extra adapter?

Yes, the cup end accepts a 1 1/2 in copper tube with a 1 5/8 in outer diameter for a direct sweat connection.

How can I verify the joint is sound after sweating the bushing into the line?

Pressure-test the assembly up to 364 psi at 100 °F; a leak-free hold confirms the sweat joints are sound.

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