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Bronze ProPress adapter with press-fit and FNPT ends

Viega

Viega 79350 ProPress adapter 1-1/4" x 1-1/4" trap

SKU CH-Z8NE-0HYZG MPN 79350

Bronze ProPress adapter joins 1-1/4" press-fit copper to 1-1/4" FNPT for potable water up to 200 psi and 250 °F

  • TypeDrain Components
  • Press-fit bronze adapter installs without soldering
  • EPDM O-ring seals potable water up to 200 psi
  • Rated for 250 °F continuous service temperature
  • Meets ASTM B75 and B88 material standards
  • Straight 1-1/4 in copper-to-FNPT transition fitting

ProPress adapter 1-1/4" x 1-1/4

The Viega 79350 is a bronze press-fit adapter designed for potable-water systems. It connects a 1-1/4" copper tube to a 1-1/4" FNPT threaded fitting in a straight configuration. Plumbers and mechanical contractors use it for quick, flameless joints on commercial and residential supply lines.

EPDM O-ring and press-to-connect design

The factory-installed EPDM O-ring seals on the copper tube when pressed with a compatible tool, eliminating the need for solder, flux or open flame. This reduces installation time and fire-risk on site while providing a permanent, leak-tested connection rated for 200 psi at 250 °F.

200 psi maximum operating pressure

The fitting is rated for 200 psi maximum operating pressure at 250 °F, which determines suitability for the intended service pressure and temperature. Installers must verify that system conditions stay within these limits before specifying this adapter.

Highlights

  • Press-fit bronze adapter installs without soldering
  • EPDM O-ring seals potable water up to 200 psi
  • Rated for 250 °F continuous service temperature
  • Meets ASTM B75 and B88 material standards
  • Straight 1-1/4 in copper-to-FNPT transition fitting

Specifications

TypeDrain Components
BrandViega
Model79350

Questions about this item

Will the EPDM O-ring on this 79350 adapter need periodic replacement?

The EPDM O-ring is rated for 250 °F and 200 psi; under normal potable-water service it should last the life of the fitting, but inspect it if the joint is ever disassembled.

What pressure limit will be reached first during continuous high-pressure use?

The fitting is rated to a maximum operating pressure of 200 psi, which is the limiting factor under sustained load.

How much heat does the bronze body transfer when hot water runs all day?

Bronze conducts heat readily, so the adapter will reach water temperature — up to the 250 °F rating — during extended hot-water circulation.

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