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Hexagonal stainless steel reducing coupling, silver finish, female threads both ends

Value Brand

Value Brand 316 Stainless Reducing Coupling 1 in x 1/2 in FNPT

SKU CH-NPYK-EXJCZ

Connects 1-inch and 1/2-inch FNPT pipes with 316 stainless steel for corrosion resistance up to 300 psi

  • Corrosion-resistant 316 stainless steel withstands harsh fluids
  • 300 psi rating handles demanding water, air, gas, oil and steam lines
  • 150 psi steam rating suits high-temperature piping systems
  • 1 in x 1/2 in FNPT threads join mismatched pipe sizes
  • Meets ASTM A679, ANSI/ASME B1.20.1 and MSS SP-114 Class 150 standards

1 in x 1/2 in FNPT Reducing Coupling

This 316 stainless steel reducing coupling joins a 1 inch nominal pipe to a 1/2 inch nominal pipe using female FNPT threads on both ends. It is intended for plumbers and maintenance engineers who need a corrosion-resistant transition in piping systems carrying water, air, natural gas, oil or steam. The fitting meets ASTM-A-679, ANSI/ASME B1.20.1 and MSS-SP-114 Class 150 standards.

300 psi pressure rating and 150 psi steam limit

The single specification that decides fit is the pressure rating: maximum 300 psi for general service and 150 psi for steam. Systems operating above these limits require a different class of fitting, so verify your line pressure before selecting this coupling.

Threaded installation with 14 TPI threads

Installation is straightforward: apply appropriate thread sealant to the 14 TPI FNPT threads and tighten to the required engagement. The main risk is over-tightening, which can distort the stainless threads or crack the mating pipe, and under-tightening, which leaves a leak path.

How it compares

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

Price $6.99
Cheaper than about 78% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

How much water or air pressure can the 300 psi rating actually handle once the coupling is threaded into a live system?

The coupling is rated for continuous operation at up to 300 psi with water, air, oil or natural gas, and up to 150 psi with steam.

What does the 14 TPI FNPT threading mean for sealing and compatibility with other fittings?

Both ends use 14 threads-per-inch Female NPT, matching ANSI/ASME B1.20.1, so they seal with standard NPT male pipe threads when assembled with sealant or tape.

What wall or bracket clearance is needed to install the 1 in by 1/2 in reducing coupling?

The fitting itself has no mounting holes; it simply threads between a 1 inch male pipe and a 1/2 inch male pipe, requiring only enough space to engage both threads.

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