Nibco, Inc.
Nibco, Inc. 604R Trap 1/2x1 1/2" C x 1" MNPT Copper Reducing Adapter
Copper reducing adapter joins 1/2 in tube to 1 in male pipe thread, rated to 722 psi at 100 °F and -20 to 400 °F service
- TypeDrain Components
- Reduces pipe diameter for flexible plumbing layouts
- Wrought copper construction resists corrosion over time
- C x MNPT connection joins tube to threaded fittings
- Rated to 722 psi at 100°F for high-pressure systems
- Operates from -20°F to 400°F across temperature extremes
Copper Reducing Adapter
The Nibco 604R is a wrot copper reducing adapter designed to join a 1/2 inch tube to a 1 inch male pipe thread. It serves plumbing professionals and DIY installers who need a reliable transition between dissimilar copper tube and pipe sizes in drain component assemblies.
Sweat-to-Male-Thread Connection
The fitting uses a C x MNPT connection type, meaning the copper tube end is soldered while the opposite end provides a 1 inch male National Pipe Thread. This single interface detail determines whether the adapter matches the existing piping and threading requirements of the installation.
Temperature and Pressure Fit
The adapter operates from -20 to 400 degrees Fahrenheit at a maximum pressure of 722 psi at 100 degrees Fahrenheit, meeting ASME/ANSI B16.22. It suits hot and cold water lines within those limits. Installers needing a female thread, a different tube diameter, or a non-copper material should select another fitting.
Highlights
- Reduces pipe diameter for flexible plumbing layouts
- Wrought copper construction resists corrosion over time
- C x MNPT connection joins tube to threaded fittings
- Rated to 722 psi at 100°F for high-pressure systems
- Operates from -20°F to 400°F across temperature extremes
Specifications
| Type | Drain Components |
|---|---|
| Brand | Nibco |
| Model | 604R 1/2x1 |
Questions about this item
What does the 722 psi @ 100 °F rating mean once this adapter is installed in a system?
It indicates the maximum working pressure the copper reducing adapter can safely handle at a temperature of 100 °F; pressure capacity decreases as temperature rises toward the 400 °F limit.
How does the ASME/ANSI B 16.22 standard affect what this C x MNPT connection can actually do?
The standard governs wrought copper solder-joint pressure fittings, ensuring the 1/2 in tube and 1 in pipe ends meet dimensional and pressure requirements for potable water and hydronic systems.
What clearance and pipe preparation does the 5/8 in x 1 in outside diameter require for a proper fit?
The 5/8 in tube end needs a 1/2 in nominal copper tube soldered into its cup, while the 1 in MNPT end threads into a matching female NPT fitting using thread sealant.
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