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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.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $121.99
Pricier than about 90% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameVIEGA

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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