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Taps & Takeoffs · Taps & Takeoffs

Round saddle tap on spiral

Round spiral main

ConnectionCurved saddle
SupportIndependent branch hanger

Before you start

  • Confirm saddle profile, main diameter, branch size, and branch angle.
  • Use the saddle as a template and verify full contact before cutting.
  • Check for spiral seams, joints, and hangers.
  • Control the cookie and debris.

Tools and materials

Round saddle tap matched to main diameter, marker, cutting tools, clamps, fasteners, sealant, branch hanger, and deburring tools.

Lay it out

  1. Mark the branch centerline.
  2. Fit and trace the saddle.
  3. Keep the opening clear of the spiral seam and joint.

Set and support it

  1. Prevent the main from rolling.
  2. Clamp the saddle evenly.
  3. Install the first branch hanger.

Make the connection

  1. 1

    Cut and deburr the curved opening.

  2. 2

    Set the saddle to the main radius.

  3. 3

    Align the outlet.

  4. 4

    Clamp both sides evenly.

  5. 5

    Fasten around the perimeter.

  6. 6

    Seal continuously.

  7. 7

    Connect and support the branch.

Check the install

  • The saddle contacts the main all around.
  • No rocking remains.
  • The main stays round.
  • The branch aligns without roll.

Common mistakes

  • Using the wrong saddle radius.
  • Fastening one side first.
  • Cutting across the spiral seam.
  • Letting the branch roll the main.

Stop and ask

Stop if the saddle radius does not match the main diameter, or if the opening conflicts with the spiral seam or joint.