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Transparent copper reducing adapter with female threaded end

Legend Valve

Legend Valve 450-740 1-1/2" x 2" C x F Adapter bathware

SKU CH-ZS3R-CAKN8

Connects a 1-1/2" copper pipe to a 2" female threaded fitting in bathware plumbing

  • ColorTransparent
  • Size1-1/2" x 2"
  • TypePipes, Valves & Fittings
  • Connects 1-1/2" copper pipe to 2" female NPT threads for secure transitions
  • Reducing C x FNPT design adapts dissimilar pipe sizes in bath installations
  • Transparent finish allows visual inspection of joint integrity after assembly
  • Legend Valve brand ensures reliable performance in residential plumbing systems
  • California Proposition 65 warning indicates chemical safety compliance for informed use

Copper Reducing Adapter for Bathware

This 1-1/2" x 2" copper reducing adapter connects a smaller copper pipe to a larger female NPT fitting in bathware installations. The C x FNPT configuration allows a direct transition between copper tubing and threaded components without additional couplings. It is intended for plumbers and DIY installers working on residential bathroom plumbing systems.

Replaces Mismatched Threaded Connections

The adapter eliminates the need to join separate reducing bushings and couplings when stepping from 1-1/2" copper to a 2" female thread. Using a single fitted piece reduces potential leak points and cuts installation time compared to assembling multiple fittings. The jump is worthwhile when a clean, code-compliant reduction is required at a tub, shower valve or supply stub-out.

Verify Pipe Sizing and Thread Compatibility

Confirm the existing copper line measures 1-1/2" inside diameter and the mating fitting provides a 2" female NPT thread before ordering. The adapter's outside dimensions are 1-5/8" x 2" OD, so ensure adequate clearance in the wall cavity. Note the California Proposition 65 warning regarding chemicals known to cause cancer and reproductive harm.

Highlights

  • Connects 1-1/2" copper pipe to 2" female NPT threads for secure transitions
  • Reducing C x FNPT design adapts dissimilar pipe sizes in bath installations
  • Transparent finish allows visual inspection of joint integrity after assembly
  • Legend Valve brand ensures reliable performance in residential plumbing systems
  • California Proposition 65 warning indicates chemical safety compliance for informed use

Specifications

BrandLEGEND VALVE
ColorTransparent
Size1-1/2" x 2"
TypePipes, Valves & Fittings

Questions about this item

What pipe sizes does the 450-740 adapter connect?

It joins a 1-1/2" copper tube to a 2" female NPT thread, with a 1-5/8" outside diameter on the copper side.

Which step is most often missed when sweating this copper-to-threaded fitting?

Clean both surfaces, apply flux, then heat the copper hub evenly before feeding solder — overheating the threaded end can damage the seal.

How often should the threaded joint be checked or re-sealed after installation?

Inspect annually for drips; re-apply thread sealant only if a leak appears, otherwise the copper sweat joint is permanent.

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