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Silver zinc-plated galvanised brass dielectric flange trap with four bolt holes

Watts

Watts 2 1/2 LF3100 Dielectric Flange trap

SKU CH-AS6G-Y8F8G

A dielectric flange trap with brass threads and polysulfone insulator rated for 175 psi and 33 to 180 degrees Fahrenheit

  • TypeDrain Components
  • ColorSilver
  • Dielectric flange prevents galvanic corrosion between dissimilar metals
  • Brass threads resist corrosion for long service life
  • Rated 175 psi maximum operating pressure for demanding systems
  • Operates from 33 to 180 degrees Fahrenheit across temperature ranges
  • Polysulfone insulator provides electrical isolation in piping installations

2 1/2 inch dielectric flange trap

The Watts LF3100 is a 2 1/2 inch dielectric flange trap designed for plumbing systems that require separation between dissimilar metals. It suits installers working on commercial or residential pipework where galvanic corrosion protection is specified. The component connects threaded brass and socket cast-iron sections in a single assembly.

Brass threaded and cast iron socket construction

The body combines a zinc-plated galvanised brass threaded end with a galvanised cast iron socket end joined by a polysulfone insulator. Four bolt holes align the mating flanges without included fasteners, so the installer supplies bolts and gaskets to match the piping schedule. Silver finish identifies the unit on site.

175 psi rating across 33 to 180 degrees F

The trap withstands a maximum operating pressure of 175 psi throughout a service temperature range of 33 to 180 degrees F. Polysulfone insulation maintains dielectric integrity across this span without additional thermal controls. No external power or active cooling is involved in normal operation.

Highlights

  • Dielectric flange prevents galvanic corrosion between dissimilar metals
  • Brass threads resist corrosion for long service life
  • Rated 175 psi maximum operating pressure for demanding systems
  • Operates from 33 to 180 degrees Fahrenheit across temperature ranges
  • Polysulfone insulator provides electrical isolation in piping installations

Specifications

TypeDrain Components
ColorSilver
BrandWatts
Model2 1/2 LF3100

Questions about this item

What does the 175 psi maximum operating pressure limit in practice?

The 175 psi rating caps the continuous working pressure the flange can safely handle in hot or cold water systems.

What bolt-hole pattern does the 2 1/2 LF3100 need to mount?

It requires a four-bolt pattern on a 5 7/8 in flange face to align with the mating pipe or equipment.

How is the dielectric flange installed and what step is often missed?

Thread the female NPT end onto the pipe, align the four bolt holes, insert bolts through both flanges, then tighten in a cross pattern to compress the polysulfone insulator evenly.

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