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Copper adapter with smooth metallic finish and threaded connection

Nibco, Inc.

Nibco, Inc. U603 1" C x FNPT Copper Trap

SKU CH-8KM1-C6205 MPN U603

A 1-inch copper adapter with a C x FNPT connection rated for 494 psi at 100 degrees F

  • Product typeDrain Components
  • Wrot copper construction resists corrosion for long service life
  • C x FNPT connection joins tube to threaded pipe without adapters
  • Rated 494 psi at 100 Degrees F for high-pressure systems
  • Operates from -20 Degrees to 400 Degrees F across wide temperature range
  • Meets ASME/ANSI B 16.22 standard for reliable performance

Copper Adapter for 1 Inch Connections

The Nibco U603 is a wrot copper adapter designed to join a 1 inch tube to a 1 inch female NPT thread. It suits plumbers and maintenance crews who need a reliable transition between copper tubing and threaded pipe in water or gas distribution systems.

Pressure Rating and Temperature Range

The fitting withstands a maximum pressure of 494 psi at 100 degrees Fahrenheit and operates continuously from -20 to 400 degrees Fahrenheit. This headroom covers most residential and light commercial hydronic loops, though it is not rated for extreme high-pressure steam mains beyond the stated limit.

Standards Compliance and Installation

Manufactured to ASME/ANSI B 16.22, the adapter meets recognised dimensional and material standards for wrought copper fittings. Normal use produces no operational noise or vibration, and the copper construction adds negligible resistance to flow while resisting corrosion in typical potable water conditions.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 93% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameNibco
Model nameU603 1
Product typeDrain Components

Questions about this item

Will the 1" C x FNPT copper trap solder cleanly to my existing 1-1/8" OD copper pipe?

Yes, the 1" nominal tube size matches 1-1/8" outside diameter copper, so it solders directly to the same pipe you already have.

How can I confirm the joint is sound after soldering?

Pressurise the line up to 494 psi at 100 °F; if no leak appears, the connection meets the ASME B16.22 rating.

Does the box include flux, solder or Teflon tape for the FNPT threads?

Only the wrought copper adapter is supplied; flux, solder and thread sealant must be purchased separately.

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