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Bronze ProPress adapter with EPDM O-ring, straight form

Viega

Viega 79425 ProPress adapter 1/2" x 3/8" trap

SKU CH-NQ1A-TDG0Z MPN 79425

Connects 1/2" copper tube to 3/8" FNPT using Viega ProPress crimp technology for potable water up to 200 psi and 250 Degrees F

  • TypeDrain Components
  • ProPress bronze adapter connects 1/2" copper to 3/8" FNPT without soldering
  • EPDM O-ring seals potable water up to 200 psi and 250 °F
  • Straight adapter body measures 1 17/32 in overall length
  • No-flange design simplifies tight-space installations
  • Model 79425 fits standard ProPress tooling for fast crimp joints

ProPress Adapter for Copper Tubing

The Viega 79425 is a straight crimp adapter fitting designed for potable water applications. It connects a 1/2 in copper tube size on the FTG side to a 3/8 in pipe size on the FNPT side. The fitting body is constructed from bronze and includes an EPDM O-ring for sealing.

Suits Press-Connection Installations

This adapter suits plumbers and installers using Viega ProPress tooling for flameless copper connections. It is not intended for sweat-solder joints, compression fittings, or push-fit systems that do not accept the ProPress crimp profile. Builders needing a different end configuration or tube size should select an alternative fitting.

Bronze Body and EPDM Seal

The bronze construction provides corrosion resistance for potable water service up to 200 psi and 250 Degrees F. The factory-installed EPDM O-ring eliminates the need for separate sealant or tape on the press end. The overall length of 1 17/32 in allows straightforward alignment in tight rough-in spaces.

Highlights

  • ProPress bronze adapter connects 1/2" copper to 3/8" FNPT without soldering
  • EPDM O-ring seals potable water up to 200 psi and 250 °F
  • Straight adapter body measures 1 17/32 in overall length
  • No-flange design simplifies tight-space installations
  • Model 79425 fits standard ProPress tooling for fast crimp joints

Specifications

TypeDrain Components
BrandViega
Model79425

Questions about this item

What copper tube size must the existing pipe be for the ProPress adapter model 79425 to connect properly?

The adapter's fitting side A is sized for 1/2 in copper tube, so the existing pipe must match that diameter for a correct press connection.

Can this bronze adapter with an EPDM O-ring handle the pressure and temperature of an older hot-water system?

It is rated for a maximum operating pressure of 200 psi and a maximum operating temperature of 250 degrees F, which covers typical residential hot-water conditions.

After pressing the adapter onto the 1/2 in copper tube, how can I confirm the joint is secure?

A properly pressed joint will show the press tool's indicator mark fully engaged on the fitting bead, and the connection should hold pressure at the rated 200 psi without leaks.

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