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Black 2-1/2 inch FNPT coupling fitting with threaded ends

Legend Valve

Legend Valve 350-509 2-1/2" Black Coupling FNPT x FNPT

SKU CH-TS5V-6W14A

Connects two 2-1/2" FNPT pipes with a durable black coupling for plumbing systems

  • 2-1/2" black coupling joins two female NPT threads securely
  • Legend Valve brand delivers reliable plumbing performance for installations
  • 350-509 model ensures precise fit for standard piping systems
  • New condition guarantees clean, undamaged threads for leak-free connections
  • California Prop 65 warning informs safe handling during installation

2-1/2" Black Coupling FNPT x FNPT

This Legend Valve coupling joins two sections of pipe with female National Pipe Thread ends. It is suited for plumbing installations that require a straight, pressure-tight connection in a 2-1/2 inch nominal size. The black finish indicates standard steel construction for general service. Buyers needing a different thread type or a reducing fitting should select another model.

Upgrade from smaller or damaged couplings

The coupling replaces a worn, corroded or undersized fitting in an existing line. The jump is worth it when the current joint leaks, when pipe diameter has been increased to 2-1/2 inches, or when a straight FNPT-to-FNPT transition is required instead of a reducer or elbow. It does not add flow capacity beyond the pipe schedule already in use.

Check thread compatibility and chemical exposure

Verify that both mating pipes have clean, undamaged FNPT threads matching the 2-1/2 inch nominal size. Confirm the system pressure and temperature fall within the coupling's pressure class. Note the Proposition 65 warning: the product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm; ensure this is acceptable for the installation environment.

Highlights

  • 2-1/2" black coupling joins two female NPT threads securely
  • Legend Valve brand delivers reliable plumbing performance for installations
  • 350-509 model ensures precise fit for standard piping systems
  • New condition guarantees clean, undamaged threads for leak-free connections
  • California Prop 65 warning informs safe handling during installation

Specifications

BrandLEGEND VALVE

Questions about this item

What thread size does the 2-1/2" black coupling need for a secure fit?

The coupling uses 2-1/2 inch FNPT threads on both ends, so it connects to matching male NPT fittings or pipe nipples of the same nominal size.

Which way do I thread the FNPT ends during installation, and what is the common mistake?

Both ends are female NPT; thread the male pipe or fitting into each side clockwise, and avoid over-tightening which can crack the black iron casting.

How often should I inspect or replace this 350-509 coupling in a water system?

Check for leaks, corrosion or thread damage at each system service; replace the coupling if you see rust scale, cracked threads or any seepage at the joint.

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