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Brass and galvanised steel dielectric union, 1 1/4 inch FIP by solder, polysulfone insulator, Buna-N gasket, three inch overall length

Watts

Watts 11/4 LF 3001A-1 1-1/4 in Dielectric Union Trap

SKU CH-20AB-9Z20Y MPN 11/4

Connects 1-1/4 inch FIP to solder joints with brass, malleable iron and polysulfone insulation rated to 250 psi and 33 to 180 degrees F

  • TypeDrain Components
  • MaterialBrass, Malleable Iron
  • Dielectric union prevents galvanic corrosion between dissimilar metals
  • Brass and malleable iron construction resists wear in plumbing systems
  • Polysulfone insulator separates conductive paths for reliable isolation
  • Buna-N gasket seals across 33 to 180 degrees F range
  • Rated for 250 psi maximum operating pressure

Dielectric union for plumbing systems

This Watts dielectric union joins a 1-1/4 inch female NPT thread to a 1-1/4 inch female solder connection. It uses a polysulfone insulator and Buna-N gasket to separate dissimilar metals and prevent galvanic corrosion in water lines. The brass and malleable iron construction suits residential and commercial plumbing installations.

Sustained pressure and temperature performance

The union is rated for a maximum operating pressure of 250 psi across a temperature range of 33 degrees to 180 degrees F. Brass and zinc-plated galvanized steel components maintain structural integrity under continuous pressurised flow. The polysulfone insulator resists degradation during prolonged exposure to hot water within the rated limits.

Verify pipe material and thread compatibility

Confirm that the existing piping uses 1-1/4 inch female NPT threads on one side and accepts a 1-1/4 inch solder joint on the other. The insulator and gasket materials are designed for potable water applications; check local codes for dielectric fitting requirements. This fitting is not intended for gas service or pressures exceeding the stated rating.

Highlights

  • Dielectric union prevents galvanic corrosion between dissimilar metals
  • Brass and malleable iron construction resists wear in plumbing systems
  • Polysulfone insulator separates conductive paths for reliable isolation
  • Buna-N gasket seals across 33 to 180 degrees F range
  • Rated for 250 psi maximum operating pressure

Specifications

TypeDrain Components
MaterialBrass, Malleable Iron
BrandWatts
Model11/4 LF 3001A-1 1/4"

Questions about this item

How hot can the water get through the 1-1/4 in dielectric union before the insulator fails?

The polysulfone insulator and Buna-N gasket are rated for continuous service up to 180 Degrees F, so water temperature must stay at or below that limit.

What pipe threads and solder fittings do I need on site to install this union?

You need a 1-1/4 in female NPT threaded connection on one side and a 1-1/4 in female solder cup on the other, plus flux and lead-free solder for the sweat joint.

Will the zinc-plated galvanized steel nut corrode when paired with my existing copper supply lines?

The dielectric design separates the brass body from the zinc-plated steel nut with a polysulfone insulator, preventing galvanic corrosion between dissimilar metals.

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