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Copper sweat flange adapter with four bolt holes

Nibco, Inc.

Nibco, Inc. 741 Sweat Flange Adapter Copper 1 in Cup 1 in Flange

SKU CH-2K6P-GJ184

Copper sweat flange adapter connects 1 in tube to a 4.25 in four-bolt flange rated for 105 psi at 100 °F

  • ColorTransparent
  • TypePipes, Valves & Fittings
  • Connects 1 in copper tube to flanged piping via sweat joint
  • Rated for 105 psi at 100 Degrees F working pressure
  • Withstands temperatures up to 400 Degrees F in service
  • Cast copper body resists corrosion in air and non-potable water
  • Four 5/8 in bolt holes on 4.25 in flange diameter

Copper Sweat Flange Adapter

The NIBCO 741 is a cast copper sweat flange adapter designed for air and non-potable water lines. It joins a 1 inch copper tube to a flanged connection in residential or light commercial plumbing systems.

Pressure and Temperature Limits

The fitting is rated for a maximum operating pressure of 105 psi at 100 degrees F and a maximum operating temperature of 400 degrees F. These limits define the safe working envelope for the installed adapter.

Installation Checks

Verify that the existing piping uses 1 inch copper tube with a 1 1/8 inch outer diameter for the sweat connection. Confirm the mating flange matches a 4.25 inch outside diameter with four 5/8 inch bolt holes on a 1/4 inch thick flange.

Highlights

  • Connects 1 in copper tube to flanged piping via sweat joint
  • Rated for 105 psi at 100 Degrees F working pressure
  • Withstands temperatures up to 400 Degrees F in service
  • Cast copper body resists corrosion in air and non-potable water
  • Four 5/8 in bolt holes on 4.25 in flange diameter

Specifications

BrandNIBCO
ColorTransparent
TypePipes, Valves & Fittings

Questions about this item

Should I choose the 1 in cup and 1 in flange version or a different size?

This fitting is a 1 in cup by 1 in flange sweat adapter in cast copper. The flange outside diameter is 4.25 in with four 5/8 in bolt holes and 1/4 in thickness. Select it when your copper tube and flange both measure 1 in.

What does the 105 psi rating mean when the adapter is installed?

The maximum operating pressure is 105 psi at 100 Degrees F. At higher temperatures the allowable pressure drops, and the absolute temperature limit is 400 Degrees F. Size the system so normal and surge pressures stay below the rated value at the actual fluid temperature.

How does the sweat connection standard limit what I can join?

The sweat cup accepts 1 in copper tube with a 1 1/8 in outer diameter. It is joined by soldering, so only copper tubing and compatible copper alloy fittings can be used. The flange end bolts to a matching 4.25 in OD flange with four 5/8 in holes.

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