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3/8 inch chrome plated cast bronze union coupling with threaded ends

Legend Valve

Legend Valve 310-142CP 3/8" chrome union coupling

SKU CH-D31G-J6ZQ9

A 3/8" chrome-plated cast bronze union coupling with FNPT threads on both ends

  • 3/8" chrome-plated union connects pipes securely
  • Cast bronze body resists corrosion for long service
  • Female NPT threads on both ends simplify installation
  • California Proposition 65 warning included for chemical awareness
  • Free manufacturer shipping on orders of $75 or more

3/8″ Chrome Union Coupling

This 3/8″ chrome-plated cast bronze union connects two female NPT threads in plumbing and light industrial systems. It provides a straight, leak-resistant joint that can be broken and remade without cutting pipe. The fitting suits installers who need a durable, corrosion-resistant coupling for water, air or inert gas lines.

Upgrade from worn or corroded brass unions

Replaces aged brass or black-iron unions that have seized, leaked or lost plating integrity. The jump is worthwhile when the existing joint shows green corrosion, weeping threads or damaged seating faces that prevent a reliable seal. Chrome plating adds surface hardness and chemical resistance for longer service in aggressive water conditions.

Hand-tight plus wrench seating

Thread each end onto clean, taped FNPT threads by hand, then tighten one to two turns with a wrench on the union nut. Over-tightening distorts the bronze seating face and causes weeping; under-tightening leaves a spiral leak path. Always inspect the gasket surface for grit before assembly — debris is the most common cause of callbacks.

How it compares

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

Price $29.99
Pricier than about 69% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameLEGEND VALVE

Questions about this item

What thread size does the 3/8-inch chrome union coupling use for each end?

Both ends are female NPT threads sized at 3/8 inch, so the coupling joins two male NPT fittings of the same diameter.

Which step is often missed when installing this cast bronze union?

Apply thread sealant or tape to the male threads before tightening each nut, and align the union faces squarely so the gasket seats evenly.

When should the internal gasket on this chrome-plated union be replaced?

Replace the gasket whenever the union is disassembled or if any seepage appears at the joint during pressure testing.

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