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Watts 1/2 LF3008 brass dielectric union, female NPT to solder, polysulfone insulator, Buna-N gasket

Watts

Watts 1/2 LF3008 Dielectric Union trap

SKU CH-S8SK-VXS5T MPN 1/2

Connects dissimilar metals with a lead-free brass dielectric union rated for 250 psi and 33 to 180 degrees F

  • TypeDrain Components
  • MaterialLead Free Brass
  • Prevents galvanic corrosion with lead-free brass construction
  • Withstands 250 psi maximum operating pressure
  • Operates reliably from 33 to 180 degrees Fahrenheit
  • Polysulfone insulator blocks electrical continuity between metals
  • Buna-N gasket ensures leak-free solder and NPT connections

What this fitting does

The Watts LF3008 dielectric union connects a half-inch female NPT thread to a half-inch female solder joint while electrically isolating dissimilar metals. It is intended for plumbing installers who need to prevent galvanic corrosion on copper or brass pipework.

Pressure and temperature headroom

The union is rated for 250 psi maximum operating pressure and a service range of 33 to 180 degrees F. It handles typical residential hot and cold lines comfortably; systems that exceed either limit will require a different component.

Thermal behaviour and power draw

The polysulfone insulator and Buna-N gasket remain stable across the stated temperature span, and the lead-free brass body does not add electrical resistance. No external power is needed, so there is no heat generation or noise from the fitting itself.

Highlights

  • Prevents galvanic corrosion with lead-free brass construction
  • Withstands 250 psi maximum operating pressure
  • Operates reliably from 33 to 180 degrees Fahrenheit
  • Polysulfone insulator blocks electrical continuity between metals
  • Buna-N gasket ensures leak-free solder and NPT connections

Specifications

TypeDrain Components
MaterialLead Free Brass
BrandWatts
Model1/2 LF3008

Questions about this item

Will the 1/2 in female NPT thread on this LF3008 union connect directly to my existing 1/2 in galvanised pipe?

Yes, the union has a 1/2 in female NPT thread that mates with standard 1/2 in male pipe threads on older galvanised or brass piping.

How can I confirm the polysulfone insulator is seated correctly after soldering the joint?

After soldering and cooling, check that the insulator sits flush inside the nut with no visible gaps, then pressurise the line up to 250 psi and watch for leaks at the gasket.

Does the box include the Buna-N gasket and brass nut, or must I buy them separately?

The union ships assembled with the Buna-N gasket and brass nut already in place; no extra parts are required for installation.

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