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Small bronze union fitting with threaded ends and hexagonal nut

Legend Valve

Legend Valve 310-142NL 3/8" Bronze Union No Lead Coupling

SKU CH-98BM-EV91J

A 3/8-inch threaded bronze union with no-lead construction for potable water lines

  • No-lead bronze meets Prop 65 safety requirements
  • 3/8" FNPT threads fit standard plumbing connections
  • Cast bronze body resists corrosion in water systems
  • Union design allows quick disassembly for maintenance
  • New condition ensures clean, undamaged threads

3/8-Inch Bronze Union for Potable Water

This no-lead cast bronze union connects two 3/8-inch female NPT threads in plumbing systems. It is built for potable water lines where lead-free materials are required by code. The bronze body resists corrosion and handles typical residential pressure and temperature ranges. Installers use it to join pipe sections that must be disconnected for maintenance.

Replaces Leaded Brass Unions in Drinking-Water

Older brass unions with lead content no longer meet modern health standards for drinking water. This fitting upgrades those connections without changing thread size or layout. The jump is worth it when local codes mandate no-lead components or when a system is being brought into compliance. It fits the same 3/8-inch FNPT ports as the fittings it replaces.

Threaded Joint Limits on Small-Diameter Lines

The 3/8-inch NPT threads seal with tape or paste, but repeated disassembly can deform the taper and cause leaks. Bronze is softer than steel, so over-tightening risks cracked ports or stripped threads. The union nut allows separation, yet the joint remains a potential drip point under vibration or thermal cycling. California Proposition 65 warnings apply to chemicals in the alloy.

Highlights

  • No-lead bronze meets Prop 65 safety requirements
  • 3/8" FNPT threads fit standard plumbing connections
  • Cast bronze body resists corrosion in water systems
  • Union design allows quick disassembly for maintenance
  • New condition ensures clean, undamaged threads

Specifications

BrandLEGEND VALVE

Questions about this item

What thread size and type does the 3/8" bronze union use for pipe connections?

The coupling has 3/8 inch FNPT threads on both ends for direct threaded pipe installation.

How do you assemble the union without damaging the bronze threads during installation?

Apply thread sealant to the male pipe threads, hand-tighten the union nuts, then finish with a wrench while holding the union body to prevent over-tightening.

When should the bronze union be inspected or replaced in a potable water system?

Inspect annually for leaks, corrosion or green patina; replace if threads show wear or if water testing reveals lead above safe limits.

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