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Silver zinc-plated iron dielectric union with female NPT threads

Watts

Watts LF3004 Dielectric Union 1-1/4 in FIP 250 psi

SKU CH-Y450-N285H

Connects dissimilar metals to prevent corrosion in plumbing systems up to 250 psi and 180 °F

  • TypeDrain Components
  • MaterialIron
  • Prevents galvanic corrosion with dielectric polysulfone insulator
  • Handles 250 psi maximum operating pressure reliably
  • Operates from 33 to 180 degrees Fahrenheit
  • Buna-N gasket ensures leak-free sealing performance
  • Zinc-plated galvanized steel construction resists corrosion

Dielectric Union for Dissimilar Metals

The Watts LF3004 dielectric union separates dissimilar metals in a piping system to prevent galvanic corrosion. It connects two sections of 1-1/4 inch Female NPT threaded pipe. The insulator is made from polysulfone and the gasket uses Buna-N material. This component is rated for a maximum operating pressure of 250 psi.

Installation Requirements and System Fit

The union installs between two female-threaded pipe ends using its zinc-plated galvanized malleable iron nuts. It requires compatible 1-1/4 inch male NPT fittings on the adjoining pipes. The overall length measures 2 3/4 inches, which determines the space needed in the assembly. The steel body provides structural strength for the connection.

Pressure and Temperature Headroom

The fitting handles continuous pressures up to 250 psi within a temperature range of 33 to 180 degrees Fahrenheit. It suits standard hot and cold water distribution lines operating inside these limits. Systems exceeding 250 psi or temperatures above 180 degrees Fahrenheit require a different pressure class or high-temperature assembly.

Highlights

  • Prevents galvanic corrosion with dielectric polysulfone insulator
  • Handles 250 psi maximum operating pressure reliably
  • Operates from 33 to 180 degrees Fahrenheit
  • Buna-N gasket ensures leak-free sealing performance
  • Zinc-plated galvanized steel construction resists corrosion

Specifications

TypeDrain Components
MaterialIron
BrandWatts
Model1 1/4 LF3004

Questions about this item

Will the 250 psi maximum operating pressure hold under continuous service?

The union is rated for 250 psi maximum operating pressure, which is the design limit for sustained use.

How hot does the polysulfone insulator and Buna-N gasket get during all-day operation?

The assembly is rated for fluid temperatures from 33 to 180 degrees F, so components stay within that range during continuous operation.

What pipe threads must I already have to install this 1-1/4 in FIP dielectric union?

You need 1-1/4 inch female NPT threads on both mating pipes to connect the union directly.

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