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Small copper plumbing adapter with threaded and sweat connections

Nibco, Inc.

Nibco, Inc. 604 1/4" C x 1/4" MNPT Copper Trap

SKU CH-74HK-ZHNVA MPN 604

Wrot copper adapter connects 1/4 inch tube to 1/4 inch MNPT, rated 912 psi at 100 degrees F and -20 to 400 degrees F

  • TypeDrain Components
  • Wrot copper construction resists corrosion and ensures long service life
  • C × MNPT connection joins 1/4 in tube to 1/4 in male pipe thread
  • Rated 912 psi at 100 °F for high-pressure plumbing systems
  • Operates from -20 °F to 400 °F across a wide temperature range
  • Meets ASME/ANSI B 16.22 standard for wrought copper fittings

Copper Adapter for 1/4" Connections

This NIBCO 604 adapter joins 1/4 inch nominal copper tube to 1/4 inch male NPT threads. It is made from wrought copper and conforms to ASME/ANSI B16.22. Plumbers and maintenance technicians use it to transition between tubing and threaded pipe in water, gas or HVAC lines.

Pressure and Temperature Headroom

The fitting withstands up to 912 psi at 100 degrees F and operates from -20 to 400 degrees F. That range covers most residential and light-commercial hot-water, steam and chilled-water circuits without derating. The copper body resists corrosion and handles thermal cycling in closed-loop systems.

Limits for High-Demand Installations

The 1/4 inch tube size restricts flow, so the adapter is not suited for high-volume supply mains or fire-sprinkler risers. Installers needing larger capacity should select a fitting with a bigger nominal bore. The 3/8 inch outside diameter also limits use in tight manifolds where clearance is critical.

Highlights

  • Wrot copper construction resists corrosion and ensures long service life
  • C × MNPT connection joins 1/4 in tube to 1/4 in male pipe thread
  • Rated 912 psi at 100 °F for high-pressure plumbing systems
  • Operates from -20 °F to 400 °F across a wide temperature range
  • Meets ASME/ANSI B 16.22 standard for wrought copper fittings

Specifications

TypeDrain Components
BrandNibco
Model604 1/4

Questions about this item

Does the 1/4-inch copper adapter need any scheduled replacement or internal parts swapped out over time?

The wrot copper adapter has no moving parts or consumable components, so no scheduled replacement is required; it remains in service until physical damage or corrosion appears.

What pressure limit will be reached first if the fitting sees continuous high-pressure flow at 100 °F?

The maximum rated pressure is 912 psi at 100 °F, which is the first limit encountered under sustained pressurised use.

How much heat does the copper fitting add to the line when it runs all day near its 400 °F upper temperature rating?

Copper conducts heat readily, so the fitting will assume the fluid temperature up to 400 °F and radiate accordingly; it generates no heat of its own.

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