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Bronze straight adapter with press-fit and FNPT ends

Viega

Viega 79345 Straight Adapter Bronze Press-Fit 1 1/4 in FNPT 1 in

SKU CH-MZQR-0A2YT MPN 79345

Bronze straight adapter joins 1 1/4 in press-fit to 1 in FNPT for potable water at 200 psi and 250 °F

  • TypeDrain Components
  • MaterialHAWA
  • Press-fit bronze body installs without soldering
  • FNPT 1 in thread connects to standard pipe
  • EPDM O-ring seals potable water systems
  • Rated 200 psi at 250 °F operating limits
  • Meets ASTM B75 and B88 standards

Straight Bronze Press-Fit Adapter

The Viega 79345 is a straight adapter made from bronze with a press-fit connection on one side and a 1 in FNPT thread on the other. It joins 1 1/4 in copper tube to threaded pipe in potable water systems. The fitting carries ASTM B75 and ASTM B88 compliance and includes an EPDM O-ring for sealing.

Press-Fit and Thread Limits

The press-fit end requires a compatible press tool and copper tubing manufactured to ASTM B88 dimensions for a reliable joint. The threaded end follows FNPT standards and must be sealed with appropriate thread tape or compound. Maximum operating pressure is 200 psi and maximum temperature is 250 Degrees F, so the system must stay within these boundaries.

Verify Tubing and Thread Compatibility

Confirm that the existing copper tube is 1 1/4 in CTS and meets ASTM B88 before pressing. Ensure the mating threaded component uses 1 in FNPT and that the system pressure and temperature do not exceed the rated limits. The overall length is 1 15/16 in, so check available space in the assembly.

Highlights

  • Press-fit bronze body installs without soldering
  • FNPT 1 in thread connects to standard pipe
  • EPDM O-ring seals potable water systems
  • Rated 200 psi at 250 °F operating limits
  • Meets ASTM B75 and B88 standards

Specifications

TypeDrain Components
MaterialHAWA
BrandViega
Model79345

Questions about this item

Which size combination fits my 1 1/4 in copper tube and 1 in threaded pipe?

This straight adapter joins a 1 1/4 in press-fit copper tube to a 1 in FNPT thread, so it matches that exact pairing.

What does the 200 psi pressure rating mean once the fitting is installed?

It indicates the joint can handle up to 200 psi in potable-water service without leaking or failing.

Which press-fit standard does this bronze adapter follow and what does it limit?

It meets ASTM B75 and ASTM B88, which govern bronze material quality and copper tube dimensions for reliable press connections.

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