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Bronze straight adapter with press-fit and FNPT ends

Viega

Viega 79335 Press-Fit 1in FNPT 1 1/4in Bronze Straight Adapter Trap

SKU CH-XG7A-Q56WY MPN 79335

Bronze straight adapter connects 1 in press-fit to 1 1/4 in FNPT for potable water systems

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

Bronze Press-Fit Adapter for Potable Water

The Viega 79335 is a straight adapter that joins a 1 in copper tube press-fit connection to a 1 1/4 in FNPT thread. It is intended for potable-water systems in residential or light-commercial plumbing where a secure, flame-free joint is required. The bronze body and EPDM O-ring provide corrosion resistance compatible with drinking-water standards.

Rated for 200 psi and 250 °F continuous service

The fitting meets ASTM B75 and ASTM B88 material specifications, giving it ample headroom for typical municipal supply pressures and hot-water circulation temperatures. It is not designed for steam lines, high-pressure hydronic loops above the rated limits, or applications that exceed the listed pressure and temperature boundaries.

Flame-free installation reduces on-site heat

The press-fit end eliminates the need for soldering torches, lowering fire risk and avoiding flux residue in the water path. The bronze construction and EPDM seal maintain joint integrity through thermal cycling without requiring re-torquing. The adapter adds 2 3/32 in to the run and introduces no moving parts that could generate noise or vibration.

Highlights

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

Specifications

TypeDrain Components
BrandViega
Model79335

Questions about this item

Will the 1 in press-fit end join cleanly to existing copper tube of the same size?

The press-fit side is made for 1 in copper tube and meets ASTM B88 dimensions, so it matches standard tube you already have.

How can I confirm the joint is sound after pressing?

Press the fitting with a compatible jaw, then pressure-test the line up to 200 psi at no more than 250 °F; a leak-free hold shows the EPDM O-ring sealed correctly.

Does the package include the press tool or any sealant?

Only the bronze straight adapter with its factory-fitted EPDM O-ring is supplied; the press tool and any thread sealant for the 1 1/4 in FNPT side must be obtained separately.

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