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Bronze straight press-fit adapter with FNPT thread, 2 in long

Viega

Viega 79330 Bronze Press-fit 1 in FNPT 1 in Trap

SKU CH-RWDG-5WZ8Y MPN 79330

Bronze press-fit adapter joins 1 in copper tube to 1 in FNPT for potable water systems, rated 200 psi and 250 Degrees F with EPDM seal

  • TypeDrain Components
  • MaterialHAWA
  • Press-fit connection speeds installation without soldering
  • Bronze body resists corrosion in potable-water systems
  • EPDM O-ring seals reliably up to 250 °F
  • Rated for 200 psi maximum operating pressure
  • Meets ASTM B75 and ASTM B88 standards

Bronze Press-Fit Drain Adapter

The Viega 79330 is a straight bronze fitting that joins a 1 in press-fit copper tube to a 1 in FNPT thread. It is built for potable-water systems and carries ASTM B75 and ASTM B88 compliance. The EPDM O-ring provides a reliable seal without soldering or threading the copper side.

Installers needing a press-to-thread transition

Plumbers who want a fast, flame-free connection on 1 in copper will find this adapter suitable. It is not intended for gas lines, drainage waste or vent piping, or any service above 200 psi or 250 Degrees F. Buyers needing a different thread size, a flanged connection or a non-bronze body should select another fitting.

Verify system pressure.

Confirm the installation will not exceed 200 psi or 250 Degrees F and that the copper tube matches the 1 in press-fit specification. Ensure the press tool and jaws are approved for this fitting profile and that EPDM is compatible with the local water chemistry. The fitting is 2 in overall length, so allow adequate space in the piping layout.

Highlights

  • Press-fit connection speeds installation without soldering
  • Bronze body resists corrosion in potable-water systems
  • EPDM O-ring seals reliably up to 250 °F
  • Rated for 200 psi maximum operating pressure
  • Meets ASTM B75 and ASTM B88 standards

Specifications

TypeDrain Components
MaterialHAWA
BrandViega
Model79330

Questions about this item

Does this 1 in press-fit adapter need a Viega press tool and jaws to install?

Yes, the 1 in press-fit connection requires a compatible Viega press tool and the correct jaw size to form a permanent joint.

Can the bronze body and EPDM O-ring handle older copper pipe that may have surface oxidation?

The bronze material and EPDM seal are rated for potable water at 200 psi and 250 Degrees F, so normal surface oxidation on existing copper will not prevent a reliable seal.

How can I confirm the joint is leak-free after pressing?

Pressurise the system up to the 200 psi rating and inspect the pressed connection; a properly formed joint will hold pressure without any visible weeping.

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