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Copper flush bushing, cylindrical, smooth metallic finish, reduced end visible

Nibco, Inc.

Nibco, Inc. 618 Flush Bushing Trap 1-1/4" x 1" FTG x C Copper

SKU CH-RYWH-X51BK MPN 618

A copper flush bushing fitting connects 1-1/4 inch to 1 inch tube sizes for drain systems

  • TypeDrain Components
  • MaterialHAWA
  • Wrot copper construction resists corrosion for long service life
  • FTG x C connection joins 1-1/4 in to 1 in tube sizes
  • Rated 439 psi at 100 °F for high-pressure systems
  • Operates from -20 °F to 400 °F across wide temperature range
  • Meets ASME/ANSI B 16.22 standard for code compliance

Product identity

The Nibco 618 is a wrot copper flush bushing designed for drain and trap assemblies. It connects a 1-1/4 inch tube fitting to a 1 inch copper sweat connection in plumbing installations. This component suits professional plumbers and DIYers joining dissimilar tube sizes in new or repair work. It is not for buyers who need a threaded adapter or a fitting rated for gas service.

Operating limits

The fitting withstands a maximum pressure of 439 psi at 100 degrees F and handles a continuous temperature range from minus 20 degrees to 400 degrees F. Copper construction provides corrosion resistance in standard drainage environments. No noise or power specifications apply to this passive mechanical part.

Deciding specification

The connection type is FTG x C, meaning one end slips over a tube fitting while the other accepts a copper tube for soldering. This joint method dictates the tools and skills required for installation. Verify that your piping layout matches this exact configuration before purchase.

Highlights

  • Wrot copper construction resists corrosion for long service life
  • FTG x C connection joins 1-1/4 in to 1 in tube sizes
  • Rated 439 psi at 100 °F for high-pressure systems
  • Operates from -20 °F to 400 °F across wide temperature range
  • Meets ASME/ANSI B 16.22 standard for code compliance

Specifications

TypeDrain Components
MaterialHAWA
BrandNibco
Model618 11/4x1

Questions about this item

How do I solder the FTG end of this 1-1/4" x 1" copper flush bushing without melting the joint?

Clean both the 1-3/8 in and 1-1/8 in outside diameters, apply flux, heat the fitting evenly until solder flows at 439 psi rated joints, and avoid overheating past 400 Degrees F.

Will the wrot copper material on this NIBCO 618 bushing need replacement due to corrosion or scaling?

Wrot copper resists scaling; inspect annually for green patina or pitting at the FTG x C connection and replace only if leaks appear at the 1-1/4 in x 1 in joint.

At what temperature does this flush bushing reach its pressure limit during continuous hot-water circulation?

The 439 psi rating holds at 100 Degrees F; above that temperature the allowable pressure drops, so sustained use near 400 Degrees F requires lower system pressure.

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