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Galvanized malleable iron hex bushing, 4 inch male by 3/4 inch female NPT threads

Value Brand

Value Brand 4" MNPT x 3/4" FNPT Galvanized Hex Bushing

SKU CH-GQ1W-5TGPA

Galvanised malleable iron hex bushing reduces a 4-inch male thread to a 3/4-inch female thread for Class 150 piping systems

  • Reduces 4-inch pipe to 3/4-inch thread for flexible plumbing layouts
  • Galvanized malleable iron resists corrosion in water and steam systems
  • Class 150 rating handles 300 psi at 150 °F for reliable service
  • ANSI B1.20.1 threads ensure leak-free connections with standard fittings
  • Operates from -20 °F to 150 °F across heating and cooling applications

Galvanized Hex Bushing 4 in x 3/4 in

This galvanized malleable iron hex bushing connects a 4-inch male NPT thread to a 3/4-inch female NPT thread. It is rated for Class 150 service and meets ANSI B 1.20.1 specifications for pipe fittings. The fitting suits water, oil, and gas piping systems in commercial or industrial settings.

Reducing from 4 in to 3/4 in pipe

The bushing replaces a straight coupling when a direct reduction between these two pipe sizes is required. It eliminates the need for multiple nipples and couplings, shortening the assembly and reducing potential leak paths. The jump is worth it when space is limited and a single-piece transition simplifies installation.

Suits installers needing a durable Class 150 reducer

The fitting serves plumbers and maintenance crews who need a pressure-rated reducer for temperatures up to 150 degrees Fahrenheit. It is not for systems exceeding 300 psi WOG or 150 psi saturated steam. Buyers requiring stainless steel, brass, or higher pressure classes should look at alternative materials.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $19.99
Typical for this category: the median of 2,955 items is $17.99.

Specifications

Product
Brand nameZORO SELECT

Questions about this item

What thread size does the 4 inch male end of this galvanized hex bushing use?

The male end has 4 inch NPT threads that conform to ANSI B 1.20.1 for a tapered pipe seal.

Which tool engages the hex on this bushing during installation, and what common mistake strips the threads?

A pipe wrench fits the external hex; over-tightening past the tapered seat strips the malleable iron threads.

When should this Class 150 galvanized malleable iron bushing be replaced in a water, oil or gas line?

Replace it if white zinc corrosion appears, threads show galling, or the joint weeps at the 300 psi cold-water rating.

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