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Brass and malleable iron dielectric union trap with MIP and solder ends

Watts

Watts 1/2 LF 3005-1/2A Dielectric Union Trap 1/2In MIPxSolder 250psi

SKU CH-N9TB-REC2C MPN 1/2

Dielectric union prevents galvanic corrosion between dissimilar metals with brass and malleable iron construction rated for 250 psi and 180 degrees F

  • TypeDrain Components
  • MaterialBrass, Malleable Iron
  • Prevents galvanic corrosion with brass and malleable iron construction
  • Handles 250 psi maximum pressure for reliable service
  • Withstands 180 degrees Fahrenheit for hot water systems
  • Meets ANSI B 16.39 standard for tensile strength and threads
  • Buna-N gasket and polysulfone insulator ensure secure sealing

Dielectric union for plumbing systems

This Watts dielectric union separates dissimilar metals in piping to prevent galvanic corrosion. It suits residential and light-commercial water lines where copper meets steel. The fitting carries a 250 psi pressure rating and handles fluid temperatures up to 180 degrees Fahrenheit. Model 3005-1/2A conforms to ANSI B16.39 for thread and tensile requirements.

Brass and malleable iron construction

The body combines brass and malleable iron with a Buna-N gasket and a polysulfone insulator. A steel nut secures the joint while the insulator breaks the electrical path between metals. One end offers a 1/2 inch male iron pipe thread and the other a 1/2 inch solder connection for direct copper tube sweating. A 1-1/2 inch hex allows standard wrench engagement during installation.

Limits of the threaded solder interface

The MIP thread requires compatible female fittings and proper sealant to maintain the 250 psi rating. The solder tail demands clean copper tube and appropriate flux for a leak-free joint. Galvanic protection only functions while the polysulfone insulator remains intact and the gasket seals correctly. Installers must observe the 180 degree Fahrenheit temperature ceiling to avoid material degradation.

Highlights

  • Prevents galvanic corrosion with brass and malleable iron construction
  • Handles 250 psi maximum pressure for reliable service
  • Withstands 180 degrees Fahrenheit for hot water systems
  • Meets ANSI B 16.39 standard for tensile strength and threads
  • Buna-N gasket and polysulfone insulator ensure secure sealing

Specifications

TypeDrain Components
MaterialBrass, Malleable Iron
BrandWatts
Model1/2 LF 3005-1/2A

Questions about this item

What pressure and temperature limits does the 3005-1/2A dielectric union handle?

The union is rated for a maximum working pressure of 250 psi and a maximum operating temperature of 180 degrees F.

What pipe size and connection types are required for the 1/2 LF 3005-1/2A fitting?

It fits 1/2 inch pipe with a male iron pipe thread on one end and a solder joint on the other.

How is the 3005-1/2A dielectric union installed, and what step is commonly missed?

Solder the tailpiece to the copper pipe first, let it cool, then thread the union nut onto the MIP end using the 1 1/2 inch hex flats; skipping the cool-down step can damage the polysulfone insulator and Buna-N gasket.

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