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Brass hexagonal reducer with male and female threaded ends

Anderson Metals

Anderson Metals Brass Reducer FNPT x MNPT 3/8 x 1/4 in

SKU CH-K0WW-JP2N0

Brass reducer connects 3/8 inch female NPT to 1/4 inch male NPT, rated to 1200 psi and NSF 61 Annex G

  • NSF 61 Annex G certified for potable water safety
  • Brass construction resists corrosion across -65 °F to 250 °F
  • 1200 psi rating handles high-pressure plumbing systems
  • 3/4 in hex allows secure wrench tightening
  • FNPT x MNPT connects 3/8 in female to 1/4 in male threads

Brass Reducer for 3/8 to 1/4 Pipe

This brass reducer connects a 3/8 inch female NPT thread to a 1/4 inch male NPT thread. It suits plumbing and pneumatic systems that require a step-down in pipe size. The fitting meets NSF 61 Annex G standards for drinking-water components. It is built for pressures up to 1200 psi and temperatures from -65 to 250 degrees Fahrenheit.

Installation uses a 3/4 inch hex

Tighten the fitting with a 3/4 inch wrench on the hex flats to avoid rounding the corners. Apply thread sealant on the male threads before assembly to prevent leaks at the joint. Over-tightening can distort the brass threads and create a leak path. The 1 7/64 inch overall length fits in tight runs where space is limited.

NPT threads seal on taper, not on a gasket

The connection relies on thread interference and sealant rather than a flat face or O-ring. This means the joint must be made up correctly each time it is assembled. The 1200 psi rating applies only when the fitting is installed in a system that does not exceed the material temperature limits. Brass is not suited for highly acidic or ammoniated fluids that cause dezincification.

How it compares

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

Price $8.99
Cheaper than about 73% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

How can I confirm the reducer is sealing properly after installation?

Pressurise the line up to the 1200 psi rating and check for leaks at the FNPT and MNPT threads; the brass construction and NSF 61 Annex G compliance indicate reliable sealing when torqued correctly.

What comes with the reducer and what must I supply?

The box contains only the brass reducer fitting measuring 1 7/64 in long with a 3/4 in hex; you must provide pipe thread sealant or tape and the mating 3/8 in and 1/4 in NPT pipes or adapters.

Which version should I choose for a 3/8 in female to 1/4 in male NPT connection?

Select the 706120-0604 model — it is the only variant listed with a 3/8 in FNPT by 1/4 in MNPT configuration, 51/64 in outside diameter and a -65 to 250 °F temperature range.

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