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Copper reducing adapter with threaded and smooth ends, model 604

Nibco, Inc.

Nibco, Inc. 604R Reducing Adapter 1x3/4 In

SKU CH-RK30-XXA04 MPN 604R

A wrot copper reducing adapter connecting 1-inch and 3/4-inch tubes in drain systems

  • TypeDrain Components
  • Wrot copper construction simplifies recycling
  • Reducing adapter joins 1 inch to 3/4 inch pipe
  • Adapter fitting enables quick drain connections
  • Drain component design fits plumbing systems
  • Model 604 identifies the fitting for ordering

Reducing Adapter 1x3/4 In

The Nibco 604R is a wrot copper reducing adapter designed to connect a one-inch tube to a three-quarter-inch male NPT thread. It serves as a drain component in plumbing systems where a secure transition between different pipe sizes is required. Copper construction provides durability and corrosion resistance for long-term service.

Copper fitting for size transitions

This adapter replaces makeshift couplings or mismatched fittings that can leak or restrict flow. The jump is worth it when a clean, code-compliant reduction is needed between 1" copper tube and 3/4" male pipe threads without introducing extra joints or dissimilar metals.

Plumbers and DIY installers

The fitting suits professionals and homeowners completing copper drain or water supply work that calls for this exact reduction. Buyers who need a different tube size, a female thread, or a non-copper material should look at other fitting types.

Highlights

  • Wrot copper construction simplifies recycling
  • Reducing adapter joins 1 inch to 3/4 inch pipe
  • Adapter fitting enables quick drain connections
  • Drain component design fits plumbing systems
  • Model 604 identifies the fitting for ordering

Specifications

TypeDrain Components
BrandNibco
Model604R 1x3/4

Questions about this item

What pipe sizes does the 1 x 3/4 inch reducing adapter connect?

The wrot copper fitting joins a 1 inch tube to a 3/4 inch male NPT thread in a straight reducing adapter configuration.

How is the copper end of the 604R adapter secured to the pipe?

The 1 inch copper socket is soldered to the tube; the joint must be cleaned, fluxed and heated evenly so the solder flows completely around the fitting.

Will the copper reducing adapter need routine maintenance after installation?

No scheduled maintenance is required; a properly soldered copper joint is permanent and only needs inspection if a leak appears at the connection.

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