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Bronze straight adapter with press-fit and threaded ends

Viega

Viega 79210 ProPress Straight Adapter 1/2 in Press-Fit x 3/8 in MNPT 1-19/32 in

SKU CH-C6Y9-5NN3M MPN 79210

A straight adapter joining 1/2 in press-fit copper to 3/8 in MNPT for potable water systems, rated 200 psi at 250 °F with an EPDM seal

  • TypeDrain Components
  • MaterialHAWA
  • Press-fit connection installs without soldering
  • Bronze body resists corrosion in potable water systems
  • EPDM O-ring seals up to 200 psi and 250 °F
  • Meets ASTM B75 and ASTM B88 standards
  • 1-19/32 in overall length fits tight spaces

Straight Adapter for Potable Water

The Viega 79210 ProPress straight adapter joins 1/2 in copper tube on the press-fit side to 3/8 in male NPT threads on the other. Bronze construction with an EPDM O-ring suits potable water systems. The fitting measures 1-19/32 in overall length and is rated for 200 psi at 250 degrees F under ASTM B75 and B88.

Upgrade from Threaded or Solder Joints

This press-fit adapter replaces traditional threaded or soldered connections where flame-free installation is preferred. The jump is worth it on retrofit jobs where open flame is restricted, or when a fast, reliable mechanical seal reduces labour on copper piping. It does not serve applications requiring a flanged or bolted joint.

Limits of Press-Fit Bronze Fittings

The bronze body and EPDM seal cap service at 200 psi and 250 degrees F, so high-pressure steam or aggressive chemical lines fall outside the design envelope. The fixed 1/2 in by 3/8 in sizing means the adapter cannot accommodate larger pipe diameters or metric tubing without a transition piece. No bolt-hole pattern is provided for flange mounting.

Highlights

  • Press-fit connection installs without soldering
  • Bronze body resists corrosion in potable water systems
  • EPDM O-ring seals up to 200 psi and 250 °F
  • Meets ASTM B75 and ASTM B88 standards
  • 1-19/32 in overall length fits tight spaces

Specifications

TypeDrain Components
MaterialHAWA
BrandViega
Model79210

Questions about this item

What size ProPress tool jaw fits the 1/2 in press-fit end of the 79210 adapter?

Use a 1/2 in ProPress jaw to crimp the press-fit end; the tool must be calibrated for that size to achieve a leak-free seal at 200 psi.

Which step do installers most often skip when pressing the 79210 adapter onto copper tube?

Failing to deburr and clean the tube before insertion prevents the EPDM O-ring from seating fully, causing leaks under pressure.

When should the EPDM O-ring inside the 79210 adapter be inspected or replaced?

Inspect the O-ring whenever the joint is disassembled or after exposure to temperatures above 250 °F; replace it if it shows cracking or hardening.

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