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Small copper adapter with threaded and smooth ends, metallic finish

Nibco, Inc.

Nibco, Inc. 604 3/8" C x MNPT Copper Trap

SKU CH-0RQJ-2HBPC MPN 604

Connects 3/8 inch copper tube to male pipe threads, rated to 779 psi at 100 degrees F

  • Product typeDrain Components
  • Wrot copper construction resists corrosion for long service life
  • C × MNPT connection joins 3/8 in tube to 3/8 in pipe threads
  • Rated to 779 psi at 100 °F for high-pressure reliability
  • Operates from −20 °F to 400 °F across wide temperature range
  • Meets ASME/ANSI B 16.22 standard for code compliance

Application & User

The Nibco 604 adapter connects 3/8 inch copper tube to a 3/8 inch male pipe thread in plumbing and hydronic systems. It suits installers who need a wrot copper transition fitting rated for high pressure and a wide temperature span.

Sustained Load Behaviour

The fitting withstands a maximum pressure of 779 psi at 100 degrees Fahrenheit and operates continuously from minus 20 to 400 degrees Fahrenheit. Copper construction resists corrosion and maintains joint integrity through repeated thermal cycles without degradation.

Thermals, Noise & Power

As a passive metal component it generates no noise and draws no power during operation. The copper body conducts heat evenly across the joint, helping the system manage temperature extremes within the rated range while meeting ASME/ANSI B 16.22 requirements.

How it compares

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

Price $2.99
Cheaper than about 96% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameNibco
Model name604 3/8
Product typeDrain Components

Questions about this item

How much heat can the copper adapter handle when it runs continuously?

The wrot copper fitting is rated from -20 °F up to 400 °F, so it stays solid through long hot-water cycles.

What pipe and tube sizes must already be in place for the C x MNPT connection?

It joins a 3/8 in nominal copper tube to a 3/8 in male NPT thread, matching the listed tube and pipe dimensions.

Will the ASME/ANSI B 16.22 marking let it work with older copper plumbing?

Yes, the ASME/ANSI B 16.22 compliance means it fits standard wrot copper fittings already installed in the system.

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