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Brass reducing adapter with threaded ends, hexagonal body

Value Brand

Value Brand 3/4" FNPT x 1/2" MNPT Brass Reducing Adapter

SKU CH-YM5P-KHYFZ

Brass reducing adapter connects 3/4" female to 1/2" male NPT threads, rated to 1200 psi and -65 to 250 °F

  • Reduces pipe diameter with 3/4" FNPT to 1/2" MNPT connection
  • Brass construction meets SAE and ASME standards for durability
  • Class 150 rating supports up to 1200 psi working pressure
  • Operates reliably from -65 to 250 degrees Fahrenheit
  • California Proposition 65 warning for cancer and reproductive harm chemicals

Pipe size and connection type

This brass reducing adapter connects a three-quarter inch female NPT thread to a one-half inch male NPT thread. It is built to Class 150 specifications and carries SAE and ASME standards compliance. The fitting suits plumbing and fluid-handling systems that require a step-down in pipe diameter.

Pressure rating and temperature range

The adapter withstands a maximum pressure of 1200 psi across an operating window from minus 65 degrees to 250 degrees Fahrenheit. Brass construction provides corrosion resistance for water, air and compatible fluid lines. No moving parts mean silent operation and no power draw.

Upgrading from mismatched threads

This part replaces improvised bushings or mismatched couplings that risk leaks at the joint. The jump is worth it when a system demands a code-compliant, rated transition between the two listed pipe sizes. It does not suit installations that require a different thread standard, a larger step change or a non-brass material.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $3.99
Cheaper than about 97% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameZORO SELECT
Product typeOther

Questions about this item

How do I install the 3/4" FNPT x 1/2" MNPT brass reducing adapter without damaging the threads?

Wrap PTFE tape clockwise on the 1/2" MNPT threads only, then hand-tighten into the female port before a final quarter-turn with a wrench; over-tightening the brass Class 150 fitting cracks the female thread.

What maintenance or replacement will the brass reducing adapter need over time?

Inspect the FNPT and MNPT joints annually for green patina or seepage; replace the adapter if dezincification appears or if the 1200 psi rating can no longer be verified after thermal cycling.

At what temperature limit does the brass reducing adapter first lose its 1200 psi pressure rating during sustained use?

The 1200 psi rating holds up to 250 °F; above that temperature the brass softens and the Class 150 pressure boundary is exceeded first.

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