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Brass fire-hose coupling with NPT and NST threads

Legend Valve

Legend Valve 322-634 A93 2-1/2" NPT x 2-1/2" NST coupling

SKU CH-SJVY-P36QA

Connects 2-1/2" NPT pipe threads to 2-1/2" NST fire hose threads for fire protection systems

  • Connects fire hose to pipe threads via NPT and NST ends
  • Legend Valve construction provides reliable performance in fire protection systems
  • Model 322-634 A93 identifies exact specification for ordering accuracy
  • New condition ensures full factory integrity for critical safety applications
  • California Proposition 65 warning discloses chemical hazard information for compliance

2-1/2" NPT x 2-1/2" NST Fire Hose Coupling

This coupling joins a 2-1/2 inch NPT thread to a 2-1/2 inch NST thread for fire hose connections. It serves municipal, industrial and commercial plumbing systems that require a direct transition between these two thread standards. The part is supplied new from Legend Valve.

Brass construction with NPT and NST threads

The fitting is manufactured from brass for corrosion resistance in wet environments. One end carries National Pipe Taper threads and the opposite end carries National Standard Thread for fire hose couplings. The threads allow a secure, leak-resistant joint without the need for welding or specialised tools.

Verify thread standards

Confirm that the existing piping uses 2-1/2 inch NPT and the hose uses 2-1/2 inch NST before purchase. The product carries a California Proposition 65 warning for chemicals known to cause cancer and reproductive harm. No additional adapters or sealants are included in the shipment.

How it compares

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

Price $35.99
Pricier than about 73% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameLEGEND VALVE

Questions about this item

What thread standards does the 322-634 A93 coupling connect?

It joins a 2-1/2" NPT male thread to a 2-1/2" NST female thread for fire hose connections.

What pipe size and wrench clearance does the 322-634 A93 fitting require?

The coupling fits 2-1/2" nominal pipe; allow enough space for a large adjustable wrench on the hex body.

How do I install the 322-634 A93 coupling without damaging the threads?

Apply PTFE tape or pipe dope to the NPT side only, hand-tighten, then finish with a wrench — do not overtighten the NST side.

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