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Bronze ProPress dielectric union trap with press-fit and FNPT ends

Viega

Viega 79180 ProPress dielectric union trap 2 in x 2 in

SKU CH-NP0B-BKJXB MPN 79180

Bronze dielectric union with press-fit and FNPT ends, EPDM seal, rated 200 psi and 250 °F

  • TypeDrain Components
  • MaterialHAWA
  • Prevents galvanic corrosion with dielectric bronze construction
  • Leak-free press-fit installation on 2 in copper tube
  • EPDM O-ring seals up to 200 psi
  • Withstands 250 °F for hot-water service
  • 3 17/32 in compact length fits tight spaces

ProPress dielectric union 2 in

The Viega 79180 ProPress dielectric union joins 2 in copper tube to 2 in FNPT threads in potable-water systems. Its bronze body and EPDM O-ring suit standard plumbing installations. The fitting installs with a press tool, removing the need for solder at the copper connection. It is intended for contractors and maintenance crews who need a dielectric transition on 2 in lines.

Pressure and temperature limits

The union is rated for a maximum operating pressure of 200 psi and a maximum operating temperature of 250 Degrees F. Bronze construction and the EPDM seal handle these conditions without degradation in normal service. No external power or active cooling is involved, so noise and power draw are not applicable. The 3 17/32 in overall length fits standard piping layouts.

Sustained service behaviour

Under continuous pressure and temperature up to the rated limits, the crimp joint and dielectric barrier maintain separation between dissimilar metals. The EPDM O-ring resists creep and retains sealing force over long periods. The fitting contains no moving parts or electronics, so performance does not vary with duty cycle. It is not suited for applications exceeding 200 psi or 250 Degrees F.

Highlights

  • Prevents galvanic corrosion with dielectric bronze construction
  • Leak-free press-fit installation on 2 in copper tube
  • EPDM O-ring seals up to 200 psi
  • Withstands 250 °F for hot-water service
  • 3 17/32 in compact length fits tight spaces

Specifications

TypeDrain Components
MaterialHAWA
BrandViega
Model79180

Questions about this item

How do I install the 2 in ProPress dielectric union and what step is often missed?

Use a Viega ProPress tool to press the 2 in copper side; the 2 in FNPT side threads on. The step often missed is confirming the EPDM O-ring is seated before pressing.

What maintenance will the 79180 union need later?

Inspect the EPDM O-ring and bronze body for corrosion or leaks during routine system checks; replace the union if the seal degrades or the dielectric function fails.

What limit appears first under sustained use of this dielectric union?

The 200 psi maximum operating pressure or 250 °F maximum operating temperature will be the first limits reached under sustained high-pressure or high-temperature conditions.

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