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Watts 1/2 LF3003 Dielectric Union brass zinc plated steel threaded ends polysulfone insulator NBR gasket

Watts

Watts 1/2 LF3003 Dielectric Union trap

SKU CH-5W65-6E7N0 MPN 1/2

Dielectric union joins 1/2 in FIP to FBP threads at 250 psi with polysulfone insulator and NBR gasket

  • TypeDrain Components
  • Prevents galvanic corrosion with dielectric polysulfone insulator
  • Handles up to 250 psi maximum operating pressure
  • Operates from 33 to 180 degrees Fahrenheit
  • Brass and zinc-plated steel construction resists corrosion
  • 2-1/4 inch overall length fits standard installations

Dielectric union for dissimilar metals

This Watts LF3003 dielectric union isolates copper from steel or iron pipework to prevent galvanic corrosion. It joins 1/2 inch female iron pipe threads to 1/2 inch female British pipe threads. The polysulfone insulator and NBR gasket maintain the electrical break while sealing the joint. Rated for 250 psi at temperatures from 33 to 180 degrees F.

Suited for potable water and hydronic systems

Plumbers and maintenance technicians fitting mixed-metal piping in residential or light-commercial buildings will use this union. It is not for installers who need a sweat or compression connection instead of threaded ends. Buyers requiring a larger nominal size or a different thread standard should select another model.

250 psi maximum operating pressure

The 250 psi pressure rating is the critical figure that determines whether this union matches the system design pressure. Verify that the service pressure never exceeds this value before installation. The 33 to 180 degrees F temperature range must also cover the intended application.

Highlights

  • Prevents galvanic corrosion with dielectric polysulfone insulator
  • Handles up to 250 psi maximum operating pressure
  • Operates from 33 to 180 degrees Fahrenheit
  • Brass and zinc-plated steel construction resists corrosion
  • 2-1/4 inch overall length fits standard installations

Specifications

TypeDrain Components
BrandWatts
Model1/2 LF3003

Questions about this item

How does the 250 psi rating hold up once the union is installed in a live water line?

The union is rated for a maximum operating pressure of 250 psi, so it will contain normal residential and light-commercial supply pressures without leaking.

What does the FIP x FBP threading mean for the fittings I can connect?

One end uses female iron-pipe threads and the other uses female British-pipe threads, letting you join two externally threaded pipes of matching standards.

What clearance do I need to thread this dielectric union into place?

The overall length is 2 1/4 in, so allow at least that much straight run plus room for a wrench on the steel nut.

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