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Red brass pipe coupling with threaded ends, hexagonal body

Value Brand

Value Brand 1-1/4" FNPT Red Brass Coupling

SKU CH-1V56-0AFXX

A red brass pipe coupling with FNPT threads rated for 125 psi and temperatures from -20 to 400 degrees Fahrenheit

  • Red brass construction resists corrosion and dezincification
  • FNPT threads seal reliably with standard NPT pipe taps
  • Class 125 rating handles 125 psi at up to 400 °F
  • Certified to NSF/ANSI 61 for potable water safety
  • Meets ASME B16.15 and ASTM B584 quality standards

1-1/4" FNPT Red Brass Coupling for Plumbing Systems

This coupling connects two pipes with 1-1/4 inch female National Pipe Thread ends. It is made from red brass that meets ASTM B584 composition requirements. The fitting suits residential and light-commercial water, air or inert-gas lines where Class 125 pressure ratings apply.

Pressure and Temperature Limits Under ANSI Standards

The coupling is rated for a maximum working pressure of 125 psi. Its service temperature range extends from -20 degrees to 400 degrees Fahrenheit. Compliance with ANSI B 1.20.1, ASME B 16.15 and NSF-61-4 through IAPMO confirms suitability for potable-water contact within those limits.

Threaded Installation and Common Seal Issues

Installation requires only hand-tightening followed by wrench engagement on the FNPT threads. Leaks usually come from insufficient thread sealant, damaged threads or exceeding the 125 psi rating. The California Proposition 65 notice indicates the alloy contains listed chemicals, so installers should wash hands after handling.

Highlights

  • Red brass construction resists corrosion and dezincification
  • FNPT threads seal reliably with standard NPT pipe taps
  • Class 125 rating handles 125 psi at up to 400 °F
  • Certified to NSF/ANSI 61 for potable water safety
  • Meets ASME B16.15 and ASTM B584 quality standards

Specifications

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Questions about this item

Which class rating should I pick for this 1-1/4" FNPT coupling?

This coupling is rated Class 125, matching ANSI B1.20.1 and ASME B16.15 for standard-pressure plumbing systems.

What does the 125 psi rating mean when the coupling is installed?

It indicates a maximum working pressure of 125 psi at temperatures up to 400°F, with a lower limit of -20°F.

Which standards govern the FNPT threads on this red brass fitting?

The FNPT threads follow ANSI B1.20.1, while the casting meets ASTM B584 and the fitting complies with ASME B16.15 Class 125.

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