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Bronze threaded coupling with no-lead finish

Legend Valve

Legend Valve 310-091NL 4 inch bronze coupling no lead

SKU CH-452X-SQP29

Four-inch threaded bronze coupling with no-lead construction for potable water plumbing

  • Lead-free bronze coupling meets California Prop 65 standards
  • 4-inch FNPT threaded ends connect pipes securely
  • No-lead cast bronze construction ensures safe potable water use
  • Durable bronze material resists corrosion in plumbing systems
  • Legend Valve brand delivers reliable fitting performance

4 inch bronze coupling

The Legend Valve 310-091NL is a 4 inch threaded coupling made from no-lead cast bronze. It connects two female NPT pipes in plumbing systems that require lead-free components. The fitting is supplied new and suits residential or commercial water lines.

No lead cast bronze construction

Bronze material resists corrosion and eliminates lead content for potable water safety. Female NPT threads on both ends allow direct connection to male-threaded pipe without additional adapters. The coupling installs with standard pipe wrenches and thread sealant.

Threaded NPT interface limits

Tapered NPT threads seal through thread deformation, so over-tightening can crack the bronze body. The joint relies on sealant or tape for leak-free performance and is not designed for repeated disassembly. California Proposition 65 warnings apply due to chemical content.

Highlights

  • Lead-free bronze coupling meets California Prop 65 standards
  • 4-inch FNPT threaded ends connect pipes securely
  • No-lead cast bronze construction ensures safe potable water use
  • Durable bronze material resists corrosion in plumbing systems
  • Legend Valve brand delivers reliable fitting performance

Specifications

BrandLEGEND VALVE

Questions about this item

What thread standard does the 4" FNPT coupling use and what does it cap in practice?

The coupling uses FNPT (Female National Pipe Taper) threads on both ends to create a pressure-tight seal when mated with matching MNPT fittings.

What physical dimensions and pipe size are required to fit this bronze coupling?

It is a 4-inch nominal size coupling with FNPT threads on both ends, requiring matching 4-inch male NPT pipe or fittings for installation.

How is this no-lead bronze coupling installed and what common step is often missed?

Apply thread sealant or tape to the male threads, thread into the female ends, and tighten with a pipe wrench; the step often missed is ensuring the sealant covers all threads evenly to prevent leaks.

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