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Straight copper press-fit adapter with FNPT thread, metallic finish

Viega

Viega 20829 Straight Adapter Copper Press-Fit 3 in FNPT 3 in

SKU CH-Q4FB-RKEM3

Connects 3-inch copper tubing to 3-inch FNPT threads with a press-fit EPDM seal rated for 200 psi and 250 degrees F

  • Press-fit copper connection installs quickly without soldering
  • Female NPT thread joins directly to threaded pipe systems
  • Rated for 200 psi working pressure in potable water lines
  • Withstands temperatures up to 250 degrees Fahrenheit
  • EPDM O-ring provides reliable seal on every joint

Viega 20829 Copper Press-Fit Adapter

This Viega 20829 straight adapter joins 3 in copper tubing to a 3 in FNPT thread using a press-fit connection on the tube side. It suits plumbers and facility technicians installing or modifying potable-water systems where a reliable, flame-free joint is required.

200 psi pressure and 250 Degrees F temperature

The fitting meets ASTM B75 and ASTM B88 standards and carries a maximum operating pressure of 200 psi with a maximum operating temperature of 250 Degrees F. EPDM O-ring material handles typical hot-water conditions, while the 4 13/16 in overall length fits standard press-tool clearances.

Replaces threaded or soldered copper-to-FNPT

It upgrades from sweat-solder or threaded brass adapters where installers want faster, solderless assembly and consistent press-seal reliability. The jump is worth it on potable-water projects that demand code-compliant copper press connections and reduced on-site labour.

Highlights

  • Press-fit copper connection installs quickly without soldering
  • Female NPT thread joins directly to threaded pipe systems
  • Rated for 200 psi working pressure in potable water lines
  • Withstands temperatures up to 250 degrees Fahrenheit
  • EPDM O-ring provides reliable seal on every joint

Specifications

BrandVIEGA

Questions about this item

Will this 3 in press-fit adapter seal against my existing copper pipe without extra soldering?

Yes — the press-fit end joins 3 in copper tube to ASTM B88 dimensions and the EPDM O-ring seats at up to 200 psi and 250 °F, so no flame or flux is needed.

How do I confirm the joint is sound after pressing?

Press the fitting with a calibrated 3 in jaw set; the tool’s indicator marks full closure, then pressurise the line to the system test pressure — no weep at 200 psi means the seal is holding.

Does the box contain the EPDM O-ring or must I order it separately?

The EPDM O-ring is factory-installed in the press-fit groove; nothing else ships with the adapter, so only pipe and press tool are required.

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