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Galvanised reducing coupling, six by four inches, threaded ends

Legend Valve

Legend Valve 352-575 6" x 4" galvanised reducing coupling bathware

SKU CH-5N7E-9K4K6

Galvanised reducing coupling joins 6-inch to 4-inch female NPT pipe threads

  • ColorTransparent
  • Size6" x 4"
  • TypePipes, Valves & Fittings
  • Reduces pipe diameter from 6" to 4" for flexible plumbing layouts
  • Galvanised steel construction resists corrosion in wet environments
  • Female NPT threads on both ends allow direct connection to threaded pipe
  • Complies with California Proposition 65 chemical disclosure requirements
  • Supplied new from Legend Valve for reliable bathware installations

Galvanised reducing coupling 6" x 4

This Legend Valve fitting connects a six-inch female NPT pipe to a four-inch female NPT pipe in bathware installations. The galvanised steel body resists corrosion in water supply lines. It is sold new and ships direct from the manufacturer. California Proposition 65 warnings apply for cancer and reproductive-harm chemicals.

Thermals noise and power draw

As a passive plumbing component the coupling generates no heat, produces no noise and draws no electrical power. Performance depends entirely on the pressure and temperature limits of the piping system it joins. No moving parts or electronics are present.

Build fit and system impact

The coupling requires matching FNPT threads on both pipes and appropriate thread sealant for a leak-free joint. It reduces line size at a single junction, freeing space compared with a reducer bushing plus nipple combination. No electrical connections, mounting hardware or control signals are needed.

Highlights

  • Reduces pipe diameter from 6" to 4" for flexible plumbing layouts
  • Galvanised steel construction resists corrosion in wet environments
  • Female NPT threads on both ends allow direct connection to threaded pipe
  • Complies with California Proposition 65 chemical disclosure requirements
  • Supplied new from Legend Valve for reliable bathware installations

Specifications

BrandLEGEND VALVE
ColorTransparent
Size6" x 4"
TypePipes, Valves & Fittings

Questions about this item

How do I install the 6" x 4" galvanised reducing coupling and what step is often missed?

Wrap thread seal tape clockwise on the male threads of both pipes, then thread the female NPT ends of the coupling onto each pipe and tighten with a pipe wrench; the step often missed is applying enough tape to prevent leaks at the larger 6" connection.

What maintenance or replacement will the galvanised reducing coupling need over time?

Inspect the galvanised coating annually for white rust or flaking; if corrosion penetrates to the base steel, replace the coupling because the threads will no longer seal reliably.

What limit appears first when the coupling is under sustained pressure and flow?

The galvanised coating is the first limit; prolonged exposure to hot water and high velocity accelerates zinc erosion, leading to internal roughness and eventual leakage at the threads.

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