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Two-inch dielectric union coupling with threaded ends

Legend Valve

Legend Valve 301-308 2" T-572 dielectric union coupling

SKU CH-CRZ1-XHGDQ

A 2-inch T-572 dielectric union coupling joins dissimilar metals while preventing galvanic corrosion in plumbing systems

  • Prevents galvanic corrosion with dielectric union design
  • Connects dissimilar metals safely using T-572 construction
  • 2-inch size fits standard plumbing applications
  • Complies with California Proposition 65 chemical disclosure requirements
  • New condition ensures reliable performance from Legend Valve

Dielectric Union Coupling 2 Inch

The Legend Valve 301-308 is a 2-inch T-572 dielectric union coupling designed for plumbing systems. It separates dissimilar metals to prevent galvanic corrosion in water lines. Professional plumbers and maintenance crews use it where copper meets steel or iron pipe. The fitting provides a reliable transition point in potable water and hydronic installations.

Brass And Steel Construction With Insulator

The coupling combines brass and steel components with a non-conductive insulator between them. This construction breaks the electrical path that drives corrosion at metal junctions. Standard NPT threads allow direct assembly onto existing pipe without special tools. The design supports routine disassembly for service or replacement of downstream components.

Replaces Failed Or Missing Dielectric Unions

This part replaces a failed or missing dielectric union in 2-inch pipework. The upgrade is worth it when inspection shows corrosion at a mixed-metal joint or when code requires dielectric separation. It is not suited for lines that need a different nominal size or a non-threaded connection method. Buyers needing other diameters or press-fit ends must source a different fitting.

Highlights

  • Prevents galvanic corrosion with dielectric union design
  • Connects dissimilar metals safely using T-572 construction
  • 2-inch size fits standard plumbing applications
  • Complies with California Proposition 65 chemical disclosure requirements
  • New condition ensures reliable performance from Legend Valve

Specifications

BrandLEGEND VALVE

Questions about this item

How does the dielectric union prevent corrosion between dissimilar metals?

The T-572 dielectric union separates copper and steel pipe with an insulating barrier that stops galvanic current, limiting corrosion at the joint.

What pipe size and thread type does the 2-inch Legend Valve 301-308 accept?

It fits 2-inch nominal pipe with standard NPT threads on both the copper and steel ends for a direct threaded connection.

What is the correct orientation when installing the T-572 dielectric union?

Install the union with the copper tailpiece toward the copper piping and the steel nut toward the steel piping; reversing them defeats the dielectric barrier.

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