We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Brass dielectric union with galvanised nut and polysulfone insulator

Watts

Watts 1 LF3002 Dielectric Union trap

SKU CH-49YP-E1B7C

A dielectric union connecting 1 inch female NPT to 3/4 inch female solder joints, rated 250 psi and 33 to 180 degrees F

  • TypeDrain Components
  • Polysulfone insulator blocks galvanic corrosion between dissimilar metals
  • Buna-N gasket seals reliably from 33 to 180 degrees Fahrenheit
  • Brass body resists dezincification in aggressive water supplies
  • Zinc-plated steel nut provides mechanical strength for 250 psi service
  • FIP by solder ends adapt copper tube to threaded pipe without extra fittings

Watts LF3002 Dielectric Union

The Watts LF3002 dielectric union separates dissimilar metals in plumbing systems to prevent galvanic corrosion. It connects a 1 inch female NPT thread to a 3/4 inch female solder joint. This component suits installers joining copper piping to galvanized or steel equipment in potable water lines.

250 psi rating and 33 to 180 degrees F range

The union withstands a maximum operating pressure of 250 psi across a temperature span of 33 to 180 degrees F. It handles typical residential and light commercial hot and cold water service. Conditions exceeding either limit require a different fitting.

Brass body with polysulfone insulator and Buna-N

The brass body and zinc-plated galvanized steel nut provide mechanical strength while the polysulfone insulator blocks electrical continuity between metals. The Buna-N gasket seals the joint without additional compounds. The 1 7/8 inch overall length fits tight rough-ins where space is limited.

Highlights

  • Polysulfone insulator blocks galvanic corrosion between dissimilar metals
  • Buna-N gasket seals reliably from 33 to 180 degrees Fahrenheit
  • Brass body resists dezincification in aggressive water supplies
  • Zinc-plated steel nut provides mechanical strength for 250 psi service
  • FIP by solder ends adapt copper tube to threaded pipe without extra fittings

Specifications

TypeDrain Components
BrandWatts
Model1 LF3002

Questions about this item

Will the 33 to 180 degree temperature range suit my older copper piping?

Yes, the union operates from 33 to 180 degrees F, matching typical residential hot-water temperatures in existing copper systems.

How can I confirm the 250 psi pressure rating holds after installation?

Pressurise the line to its normal working pressure and inspect the Buna-N gasket and polysulfone insulator for leaks; no weeping means the seal is holding.

Does the box include the zinc-plated steel nut and insulator, or must I buy them separately?

The union ships complete with the zinc-plated galvanized steel nut, polysulfone insulator and Buna-N gasket already assembled; no extra parts are required.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.