We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Copper adapter fitting with threaded female end, model 603

Nibco, Inc.

Nibco, Inc. 603 2" C x FNPT copper trap

SKU CH-KK6Y-S730C MPN 603

A 2-inch copper adapter connects tube to female NPT threads and withstands 364 psi at 100°F

  • TypeDrain Components
  • Wrot copper construction resists corrosion for long service life
  • 364 psi rating at 100 Degrees F handles high-pressure systems
  • Operates from -20 Degrees to 400 Degrees F across extreme temperatures
  • C x FNPT connection joins 2 in tube to 2 in pipe threads
  • Meets ASME/ANSI B 16.22 standard for reliable installation

Copper Adapter for Drain Systems

This Nibco 603 adapter joins a 2 in copper tube to a 2 in female NPT thread in drainage installations. It is made from wrought copper and built to ASME/ANSI B 16.22. The fitting handles the pressure and temperature demands of standard plumbing work.

Fit for Copper Drain Lines

It suits installers who need a reliable C x FNPT transition on a 2 in drain line. It is not for buyers who require a different connection type, a different tube diameter, or a material other than copper.

Rated to 364 psi at 100 °F

The maximum working pressure is 364 psi at 100 °F, with a service range from -20 °F to 400 °F. This single rating determines whether the adapter meets the system’s design conditions.

Highlights

  • Wrot copper construction resists corrosion for long service life
  • 364 psi rating at 100 Degrees F handles high-pressure systems
  • Operates from -20 Degrees to 400 Degrees F across extreme temperatures
  • C x FNPT connection joins 2 in tube to 2 in pipe threads
  • Meets ASME/ANSI B 16.22 standard for reliable installation

Specifications

TypeDrain Components
BrandNibco
Model603 2

Questions about this item

How do I solder the 2" C x FNPT copper adapter to the 2-1/8 in. tube, and what step do installers often miss?

Clean the tube end and fitting socket, apply flux, heat evenly until solder flows into the joint, then wipe excess. The step often missed is deburring the cut tube so solder can seal completely.

What maintenance will the wrot copper trap need over time?

Inspect joints annually for green corrosion or leaks. Re-solder any weeping connections. The copper material resists scaling, so no internal cleaning is required unless water chemistry is unusually aggressive.

At what pressure limit does the adapter reach its rating during sustained hot-water use?

The fitting is rated for 364 psi at 100 °F. Pressure capacity decreases as temperature rises toward the 400 °F maximum, so sustained high-temperature operation will hit the pressure limit first.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.