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Brass dielectric coupling with threaded ends, 3/4 inch

Legend Valve

Legend Valve 301-534 3/4 inch T-578 dielectric coupling

SKU CH-C80Q-7KEW8

3/4-inch T-578 dielectric coupling separates dissimilar metals to prevent galvanic corrosion in plumbing systems

  • Prevents galvanic corrosion with dielectric coupling design
  • 3/4 inch T-578 model fits standard plumbing connections
  • Legend Valve brand ensures reliable fitting performance
  • New condition guarantees unused factory quality
  • California Proposition 65 warning indicates chemical compliance disclosure

Dielectric coupling for 3/4 inch pipe

The Legend Valve 301-534 T-578 dielectric coupling separates dissimilar metals in a plumbing line to reduce galvanic corrosion. It fits a standard 3/4 inch connection and is supplied new for residential or commercial water systems. Installers use it where copper meets steel or iron to extend the service life of the joint.

California Proposition 65 warning applies

This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. The notice is a regulatory requirement and does not describe a functional limitation of the coupling itself. Buyers who must avoid listed substances should review the warning before specifying the part.

Replaces a standard metal-to-metal union

A plain brass or steel coupling allows direct contact between different pipe metals, which accelerates corrosion at the joint. The dielectric coupling inserts a non-conductive barrier that interrupts the electrical path. The upgrade is worth it whenever the piping system joins dissimilar metals and long-term joint integrity is a priority.

Highlights

  • Prevents galvanic corrosion with dielectric coupling design
  • 3/4 inch T-578 model fits standard plumbing connections
  • Legend Valve brand ensures reliable fitting performance
  • New condition guarantees unused factory quality
  • California Proposition 65 warning indicates chemical compliance disclosure

Specifications

BrandLEGEND VALVE

Questions about this item

Which Legend Valve dielectric coupling size should I select for a 3/4 inch pipe?

The 301-534 model is a 3/4 inch T-578 dielectric coupling, so it matches that pipe size directly.

What does the T-578 designation indicate when the coupling is installed?

The T-578 marking identifies this specific Legend Valve dielectric coupling model for 3/4 inch applications.

Does the 3/4 inch T-578 coupling meet any specific plumbing standard?

The product carries California Proposition 65 warnings for chemicals known to cause cancer and reproductive harm.

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