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Bronze ProPress adapter with press and FNPT ends

Viega

Viega 79315 ProPress adapter 3/4" press x 3/4" FNPT bronze

SKU CH-RK51-5V59S MPN 79315

Bronze press-to-FNPT adapter for 3/4" copper tube, rated 200 psi at 250 °F with EPDM seal

  • TypeDrain Components
  • MaterialHAWA
  • ProPress press-fit installs without soldering or open flame
  • Bronze body with EPDM O-ring handles 200 psi at 250 °F
  • 3/4 in press-to-FNPT straight adapter fits copper tube directly
  • Meets ASTM B75 and ASTM B88 material standards
  • 1 13/16 in overall length suits tight drain-component layouts

ProPress Bronze Adapter 3/4

The Viega 79315 is a straight ProPress adapter that joins a 3/4 in copper tube press connection to a 3/4 in FNPT threaded port. It is intended for potable water systems where a reliable, flame-free joint is required. The bronze body and EPDM O-ring suit standard plumbing installations.

Press-Fit to FNPT Transition

This fitting bridges a press-fit copper tube end and a female NPT thread in a single piece. Side A accepts 3/4 in copper tube size while Side B provides a 3/4 in FNPT connection. The straight adapter shape simplifies layout in tight runs.

Rated Pressure and Temperature

Maximum operating pressure is 200 psi and maximum operating temperature is 250 Degrees F. The bronze construction meets ASTM B75 and ASTM B88 standards for potable water use. No flame or solder is needed during installation.

Highlights

  • ProPress press-fit installs without soldering or open flame
  • Bronze body with EPDM O-ring handles 200 psi at 250 °F
  • 3/4 in press-to-FNPT straight adapter fits copper tube directly
  • Meets ASTM B75 and ASTM B88 material standards
  • 1 13/16 in overall length suits tight drain-component layouts

Specifications

TypeDrain Components
MaterialHAWA
BrandViega
Model79315

Questions about this item

What does the 200 psi rating mean when the adapter is installed in a potable-water system?

The 200 psi maximum operating pressure is the highest sustained pressure the bronze body and EPDM O-ring can handle in a potable-water line; system pressure must stay below this value.

How does the press-fit connection work and what limits does it impose?

The press-fit side uses a Viega ProPress tool to compress the O-ring onto 3/4 in copper tube, creating a permanent joint that cannot be disassembled and must follow the tool manufacturer's calibration.

What overall length and material should I allow for when routing the pipe?

The straight bronze adapter measures 1 13/16 in overall length and requires enough straight copper tube on the press side for the pressing jaws to engage fully.

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