We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Brass fire hose coupling with NST and NPT threads

Legend Valve

Legend Valve 322-734 A75 2-1/2" NST x 1" NPT coupling

SKU CH-SHHX-4R72R

Connects 2-1/2" NST fire hose to 1" NPT piping with a durable A75 brass fitting

  • Connects 2-1/2" NST fire hose to 1" NPT threads
  • Legend Valve brand backs the fitting with recognized quality
  • New condition means full service life from day one
  • California Proposition 65 warning discloses chemical risk
  • Manufacturer ships direct on orders of $75 or more

2-1/2" NST to 1" NPT Fire Hose Fitting

This Legend Valve coupling connects a 2-1/2 inch NST fire hose thread to a 1 inch NPT pipe thread. It is built for fire protection systems and industrial water supply lines where dissimilar thread standards meet. The brass construction resists corrosion in wet environments. Installers use it to adapt hydrant or hose connections to standard piping.

Thermals Noise and Power

As a passive brass fitting, the part generates no heat, emits no noise and draws no electrical power during normal operation. Flow restriction is limited to the internal geometry of the reducer. System pressure and fluid temperature determine the mechanical stress on the joint.

Build Integration

The fitting requires a 2-1/2 inch NST female thread on one side and a 1 inch NPT female thread on the other. Thread sealant or tape compatible with potable or fire suppression water is needed for assembly. It frees the installer from sourcing separate adapters for each thread standard. California Proposition 65 warnings apply to this product.

Highlights

  • Connects 2-1/2" NST fire hose to 1" NPT threads
  • Legend Valve brand backs the fitting with recognized quality
  • New condition means full service life from day one
  • California Proposition 65 warning discloses chemical risk
  • Manufacturer ships direct on orders of $75 or more

Specifications

BrandLEGEND VALVE

Questions about this item

How do I install the 2-1/2" NST x 1" NPT coupling and what step is commonly missed?

Apply thread sealant to the 1" NPT male threads, hand-tighten into the female port, then finish with a wrench; the step often missed is using a sealant compatible with potable water if the system requires it.

What maintenance or replacement will the A75 coupling need over time?

Inspect the NST and NPT threads annually for corrosion or deformation; replace the coupling if thread galling, cracking, or leakage appears during pressure testing.

What limit appears first on the Legend Valve 322-734 under sustained pressure?

The brass body and thread engagement determine the pressure ceiling; sustained operation near the rated working pressure will show thread leakage or body stress before any other failure mode.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.