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Bronze press-fit adapter with FNPT end, straight body, EPDM seal

Viega

Viega 79360 ProPress adapter 1-1/2" x 1-1/4" trap

SKU CH-XK1N-AK02E MPN 79360

ProPress bronze adapter joins 1-1/2 in press-fit to 1-1/4 in FNPT for potable water up to 200 psi and 250 Degrees F

  • TypeDrain Components
  • MaterialHAWA
  • Press-fit connection eliminates soldering for faster installation
  • Bronze construction with EPDM O-ring handles 200 psi at 250 °F
  • Straight adapter joins 1-1/2" copper tube to 1-1/4" FNPT thread
  • Meets ASTM B75 and ASTM B88 standards for potable water use
  • Compact 2 3/8" length fits tight drain and trap assemblies

ProPress Adapter 1-1/2" x 1-1/4

This Viega ProPress adapter connects a 1-1/2 inch press-fit copper tube to a 1-1/4 inch FNPT threaded pipe. The bronze fitting uses an EPDM O-ring to create a secure joint for potable water systems. Installers press the connection without solder or flux, reducing on-site labour time. It suits residential and commercial plumbing projects needing a straight transition between press and thread ends.

Press-Fit Limits 200 psi 250°F

The fitting meets ASTM B75 and ASTM B88 standards for bronze construction and copper tube dimensions. Maximum operating pressure is 200 psi and maximum operating temperature is 250 degrees Fahrenheit. The press-fit seal relies on the EPDM O-ring, which must stay within these pressure and temperature boundaries to maintain integrity. Exceeding either limit risks leakage or fitting damage in potable water service.

Capacity Headroom Bronze EPDM

The 1-1/2 inch press side accepts standard copper tube sizes while the 1-1/4 inch FNPT side mates with common threaded components. Bronze material resists corrosion in potable water, and the EPDM seal handles typical hot and cold supply temperatures. The straight adapter shape fits tight runs where elbows would add bulk. Systems requiring larger diameter transitions or different thread types need alternative fittings.

Highlights

  • Press-fit connection eliminates soldering for faster installation
  • Bronze construction with EPDM O-ring handles 200 psi at 250 °F
  • Straight adapter joins 1-1/2" copper tube to 1-1/4" FNPT thread
  • Meets ASTM B75 and ASTM B88 standards for potable water use
  • Compact 2 3/8" length fits tight drain and trap assemblies

Specifications

TypeDrain Components
MaterialHAWA
BrandViega
Model79360

Questions about this item

Should I choose the 1-1/2" press end or the 1-1/4" threaded end for my connection?

This adapter joins a 1-1/2" copper tube press connection to a 1-1/4" FNPT thread; select the end that matches the pipe or fitting you are joining to.

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

It indicates the maximum continuous operating pressure the bronze body and EPDM seal are designed to withstand in service.

Which standard governs the press-fit connection and what does it cap in practice?

ASTM B88 covers the copper tube dimensions, ensuring the press seal meets the 200 psi and 250 °F limits.

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