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Malleable iron reducer coupling with female NPT threads

Value Brand

Value Brand Reducer Coupling 2" x 1-1/4" FNPT Malleable Class 300

SKU CH-4NHH-34NH5

Reduces 2-inch to 1-1/4-inch female NPT threads in Class 300 malleable iron

  • Connects 2" and 1-1/4" pipes securely
  • Malleable iron construction resists mechanical stress
  • Class 300 rating suits high-pressure systems
  • Female NPT threads on both ends ensure compatibility
  • New condition guarantees full service life

Value Brand Reducer Coupling 2" x 1-1/4" FNPT

This malleable iron reducing coupling joins a two-inch female NPT pipe to a one-and-a-quarter-inch female NPT pipe. It is rated for Class 300 service and suits plumbing installations that require a durable, threaded transition between different pipe diameters. The fitting is new and ready for industrial or commercial pipework assemblies.

Threaded NPT connection limits

Both ends use 11-1/2 threads per inch National Pipe Taper threads, which seal through thread interference and require appropriate sealant or tape. The Class 300 rating defines the maximum pressure capability at ambient temperature for this malleable iron material. Installers must verify that the system pressure and temperature remain within the fitting's rated class to maintain joint integrity over time.

Malleable iron construction and installation

Malleable iron provides mechanical strength and shock resistance superior to standard cast iron for threaded fittings. The female threads on both ends accept male NPT pipe nipples or equipment connections directly without additional adapters. The reducing design allows a straight-line transition in piping layouts, reducing the need for multiple bushings and minimising potential leak paths in the assembled system.

Highlights

  • Connects 2" and 1-1/4" pipes securely
  • Malleable iron construction resists mechanical stress
  • Class 300 rating suits high-pressure systems
  • Female NPT threads on both ends ensure compatibility
  • New condition guarantees full service life

Specifications

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Questions about this item

Should I choose the 2 inch by 1-1/4 inch reducing coupling or a straight coupling of the same class?

Choose the reducing coupling when you need to join a 2 inch NPT line to a 1-1/4 inch NPT line; choose a straight coupling only when both pipes are the same nominal size.

What does the Class 300 rating mean once the fitting is installed?

Class 300 identifies the pressure-temperature rating of the malleable iron body; the actual working pressure depends on the fluid temperature and the applicable piping code.

How does the 11-1/2 NPT thread standard affect the connection?

Both ends use 11-1/2 threads per inch NPT, so each joint requires a compatible NPT male thread and sealant to make a pressure-tight seal.

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