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Brass fire-hose coupling with NST and NPSH threads

Legend Valve

Legend Valve 322-744 A75 2-1/2" NST x 2" NPSH coupling

SKU CH-WRX7-10FRS

Connects 2-1/2 inch NST fire hose threads to 2 inch NPSH threads for fire-suppression systems

  • Fire-hose fitting connects 2-1/2" NST to 2" NPSH for compatible systems
  • Legend Valve brand identifies the manufacturer for sourcing and support
  • Model 322-744 specifies the exact part number for ordering accuracy
  • A75 designation marks the series for correct application matching
  • California Proposition 65 notice alerts to listed chemical hazards

Legend Valve Fire Hose Fitting

The Legend Valve 322-744 A75 connects a 2-1/2 inch NST thread to a 2 inch NPSH thread. It is built for fire-hose assemblies and water-supply lines that require this specific thread transition. The fitting is supplied new and ships directly from the manufacturer. California Proposition 65 warnings apply for cancer and reproductive-harm chemicals.

Suited For Fire-Service Connections

This coupling suits installers who must join NST and NPSH threads on hose or hydrant equipment. It does not suit systems using other thread standards such as NPT or BSP. Buyers who need a different thread combination or a larger diameter should look at another fitting. The product carries Proposition 65 notices for listed chemicals.

Simple Threaded Installation

Installation is a matter of threading the NST end onto the matching male connection and the NPSH end onto its counterpart. Leaks usually come from damaged threads, missing gaskets or insufficient tightening. The fitting ships from the manufacturer with free shipping on orders of 75 or more. No special tools are required beyond standard hose wrenches.

Highlights

  • Fire-hose fitting connects 2-1/2" NST to 2" NPSH for compatible systems
  • Legend Valve brand identifies the manufacturer for sourcing and support
  • Model 322-744 specifies the exact part number for ordering accuracy
  • A75 designation marks the series for correct application matching
  • California Proposition 65 notice alerts to listed chemical hazards

Specifications

BrandLEGEND VALVE

Questions about this item

What thread type must my existing hose or hydrant have to connect to the 2-1/2" NST side of this coupling?

The coupling’s 2-1/2" end uses National Standard Thread (NST), so the mating component must also have NST threads for a proper seal.

Will the 2" NPSH end mate with standard NPT fittings I already use?

No, NPSH is a straight fire-hose thread and will not seal against tapered NPT threads; you need a matching NPSH female or an appropriate adapter.

After tightening, how can I confirm the joint is leak-free?

Pressurise the line and inspect both the NST and NPSH faces for any water seepage; a correctly made joint shows no drips under working pressure.

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