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Small copper reducing coupling with two cup ends, shiny metallic finish

Nibco, Inc.

Nibco, Inc. 600-R Copper Reducing Coupling 5/16 x 1/8 bathware

SKU CH-89R8-624ET

Connects 5/16 in and 1/8 in copper tubes for air, gases or potable water up to 623 psi and 400 °F

  • Product colorTransparent
  • Product typePipes, Valves & Fittings
  • Reduces 5/16" to 1/8" copper tube in straight runs
  • Wrot copper body handles 623 psi at 200°F for air, gases or potable water
  • Sweat cup ends on both sides create permanent leak-tight joints
  • Rated to 400°F maximum operating temperature for demanding plumbing systems
  • Nibco 600-R series fitting built for reliable residential and commercial installations

Copper Reducing Coupling 5/16 x 1/8

This NIBCO 600-R coupling joins 5/16 in and 1/8 in copper tube sizes in a straight reducing configuration. It is made from wrot copper for use in plumbing and mechanical systems. The fitting accepts sweat connections on both ends for air, gases and potable water applications. It ships new and ready for installation.

Maximum Operating Pressure 623 psi

The coupling is rated for a maximum operating pressure of 623 psi at 200 Degrees F. This single pressure rating determines whether the fitting meets the demands of the specific system design. Installers must verify that the service pressure does not exceed this limit for safe operation.

Temperature Headroom to 400 Degrees F

The fitting withstands a maximum operating temperature of 400 Degrees F, providing headroom for hot water and heating circuits. It handles standard residential and light commercial temperatures comfortably. Systems running above this temperature require a different fitting material or design.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $3.99
Cheaper than about 97% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameNIBCO
Product colorTransparent
Product typePipes, Valves & Fittings

Questions about this item

How much pressure can the 5/16 by 1/8 inch reducing coupling handle at 200 degrees Fahrenheit?

The coupling is rated for a maximum operating pressure of 623 psi at 200 degrees Fahrenheit.

What temperature limit applies when using this copper reducing coupling with potable water?

The maximum operating temperature is 400 degrees Fahrenheit for air, gases and potable water applications.

What tube outer diameters does this straight reducing coupling connect?

It joins a 7/16 inch outer diameter tube on the 5/16 inch side to a 1/4 inch outer diameter tube on the 1/8 inch side.

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