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Bronze ProPress straight adapter, 1/2 in by 3/4 in, EPDM O-ring

Viega

Viega 79435 ProPress adapter 1/2 x 3/4 trap

SKU CH-R3J4-2NXRV MPN 79435

Connects 1/2" copper tube to 3/4" FNPT using a ProPress bronze adapter rated for 200 psi and 250°F

  • TypeDrain Components
  • MaterialBronze
  • Bronze body resists corrosion in potable water systems
  • ProPress crimp connection installs without solder or flame
  • EPDM O-ring seals up to 200 psi and 250 °F
  • Straight adapter joins 1/2 in copper tube to 3/4 in FNPT
  • Compact 1 13/16 in length fits tight drain spaces

ProPress Adapter 1/2 x 3/4

The Viega 79435 ProPress adapter connects 1/2 inch copper tube to a 3/4 inch female NPT thread. It is intended for potable water systems where a secure, press-fit transition is required without soldering or threading the copper side.

Bronze Body With EPDM Seal

The bronze construction and factory-installed EPDM O-ring handle continuous service up to 200 psi and 250 degrees F. The crimp connection remains leak-free under sustained pressure cycling because the mechanical press and elastomer seal do not rely on heat-affected joints or thread sealant that can degrade over time.

Straight Adapter For Press Systems

This fitting only works with Viega ProPress tools and jaws matched to 1/2 inch copper tube size. It cannot be used with push-fit, compression or sweat connections, and it does not adapt to other pipe materials or diameters outside the stated 1/2 x 3/4 configuration.

Highlights

  • Bronze body resists corrosion in potable water systems
  • ProPress crimp connection installs without solder or flame
  • EPDM O-ring seals up to 200 psi and 250 °F
  • Straight adapter joins 1/2 in copper tube to 3/4 in FNPT
  • Compact 1 13/16 in length fits tight drain spaces

Specifications

TypeDrain Components
MaterialBronze
BrandViega
Model79435

Questions about this item

How much heat can the bronze body and EPDM O-ring handle during continuous hot-water circulation?

The adapter is rated for a maximum operating temperature of 250 degrees F, so the bronze body and EPDM seal will withstand typical hot-water recirculation loops without degradation.

Which press tool and jaw size are required to make a leak-free joint on the 1/2-inch FTG end?

You need a Viega ProPress tool with a 1/2-inch jaw set; the 1/2-inch copper tube size on side A is designed for that specific press profile.

Will the 3/4-inch FNPT thread mate directly with the 3/4-inch MIP nipples already on my existing brass manifold?

Yes, the 3/4-inch FNPT connection follows standard NPT taper, so it threads onto 3/4-inch MIP nipples without adapters.

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