Dielectric Unions/Nipples

Dielectric unions are specialized fittings designed to prevent accelerated corrosion and deterioration in piping systems due to galvanic and stray currents. Utilized in both commercial and residential applications, these unions facilitate the connection of dissimilar metal pipes while mitigating the risk of galvanic corrosion. The unique design of dielectric unions incorporates materials that effectively isolate the different metals, ensuring the durability and longevity of the entire piping system.

Dielectric Unions are used in commercial and residential applications to prevent accelerated corrosion and deterioration in the piping system due to galvanic and stray current. It is installed between pipes made from dissimilar metal.


  • Isolation of dissimilar metals: Dielectric unions effectively isolate different metal pipes, preventing galvanic corrosion and improving the lifespan of the piping system.
  • Versatility: Available in various configurations, sizes, and materials, dielectric unions cater to diverse requirements and can be used in a wide range of applications.
  • Pressure and temperature resistance: These unions are designed to withstand varying pressure and temperature conditions, ensuring reliable performance under different operating conditions.
  • Durable construction: Dielectric unions typically consist of high-quality, corrosion-resistant materials, contributing to their durability and long-lasting performance.

Application Areas

  • Hot water storage tanks: Dielectric unions help maintain the integrity of the tank by preventing corrosion at the connection points of different metal pipes.
  • Air conditioning systems: These unions ensure the efficient functioning of air conditioning systems by preventing the galvanic corrosion of metal components.
  • Processing tanks: In industries where processing tanks are used, dielectric unions contribute to the preservation of the tanks by minimizing the risk of corrosion.
  • Steam, gas, and water piping: Dielectric unions are employed to maintain the durability and efficiency of steam, gas, and water piping systems in both commercial and residential settings.

Max. Working Pressure: 250 psi (17.2 bar)
Max. Working Temperature: 180ºF (82ºC)

Available Connection Types
Male Steel BSPT x Male Brass BSPT
Male Steel BSPT x Female Brass BSPT
Male Steel BSPT x Brass Solder
Steel Female BSPT x Brass Male BSPT
Female Steel BSPT x Female Brass BSPT
Female Steel BSPT x Brass Solder


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