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Straight copper reducing adapter, press-fit to FTG, shiny metallic finish

Viega

Viega 20773 Straight Reducing Adapter 4 in Press-Fit x 2 in FTG Copper

SKU CH-F81Q-J83GE

Copper straight reducing adapter connects 4 in press-fit to 2 in FTG for potable water at 200 psi and 250 °F

  • Press-fit connection eliminates open-flame soldering on 4 in copper
  • Reduces 4 in press-fit to 2 in FTG for system transitions
  • EPDM O-ring rated to 200 psi and 250 °F for potable water
  • Copper body meets ASTM B75 and ASTM B88 material standards
  • 6 5/32 in straight adapter fits tight mechanical rooms

Viega 20773 Copper Press-Fit Reducing Adapter

The Viega 20773 is a straight reducing adapter made from copper with an EPDM O-ring. It connects a 4-inch press-fit end to a 2-inch FTG end for potable water systems. The fitting meets ASTM B75 and ASTM B88 standards and has an overall length of 6 5/32 inches. It is rated for a maximum operating pressure of 200 psi and a maximum operating temperature of 250 degrees F.

Verify Pipe Sizes and Press Tool Compatibility

Confirm that your existing piping uses 4-inch and 2-inch copper tube sizes matching the fitting ends. Ensure you have the correct press tool and jaw profile approved for Viega press-fit connections. Check that the system pressure and temperature stay within the 200 psi and 250 degrees F limits. The EPDM O-ring material must be compatible with your water treatment chemistry.

Replaces Soldered or Threaded Reducing Couplings

This adapter replaces traditional soldered or threaded copper reducing couplings where a flame-free, press-fit installation is preferred. The jump is worth it when labour savings, fire-safety restrictions or tight scheduling make press technology advantageous. It is not suited for systems requiring larger size transitions or different fitting configurations.

Highlights

  • Press-fit connection eliminates open-flame soldering on 4 in copper
  • Reduces 4 in press-fit to 2 in FTG for system transitions
  • EPDM O-ring rated to 200 psi and 250 °F for potable water
  • Copper body meets ASTM B75 and ASTM B88 material standards
  • 6 5/32 in straight adapter fits tight mechanical rooms

Specifications

BrandVIEGA

Questions about this item

Does the Viega 20773 adapter come with the EPDM O-ring installed or do I need to buy it separately?

The EPDM O-ring is part of the fitting and is included in the box; no separate purchase is required.

The listing shows a 4 in press-fit end and a 2 in FTG end — which size should I choose for my copper pipe?

Choose this model when you need to connect a 4 in press-fit copper tube to a 2 in FTG copper tube; the sizes are fixed for this part number.

What does the 200 psi rating mean when the adapter is pressed onto a 4 in copper line?

It means the joint is tested to hold up to 200 psi at temperatures up to 250 °F in potable-water systems.

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