TinnerFlow
Taps & Takeoffs · Taps & Takeoffs

Bottom-mounted rectangular tap

Bottom of rectangular main

ConnectionFlanged/screwed tap
SupportIndependent drop support

Before you start

  • Confirm exact ceiling or terminal location, drop size, access, and support.
  • Check the main for hangers, reinforcement, and devices.
  • Verify the drop will not interfere with another service.
  • Support the cookie before the final cut.

Tools and materials

Bottom-mounted rectangular tap, layout tools, cutting tools, clamps, fasteners, sealant, drop support, terminal support, and deburring tools.

Lay it out

  1. Mark the exact drop location.
  2. Check the plumb line to the terminal.
  3. Keep the opening clear of hangers and devices.

Set and support it

  1. Support the main if needed.
  2. Clamp the tap flush.
  3. Provide independent drop and terminal support.

Make the connection

  1. 1

    Cut while controlling the cookie.

  2. 2

    Deburr the opening.

  3. 3

    Set and square the tap.

  4. 4

    Clamp and fasten evenly.

  5. 5

    Seal the perimeter.

  6. 6

    Connect the drop.

  7. 7

    Support the drop and terminal independently.

Check the install

  • The drop is plumb.
  • The main carries no terminal weight.
  • The tap is flush and sealed.
  • Access remains usable.

Common mistakes

  • Letting the terminal hang from the main.
  • Cutting into a hanger zone.
  • Using a crooked drop to pull the tap.
  • Skipping terminal support.

Stop and ask

Stop if the tap interferes with a hanger or device access, or if the drop and terminal cannot be supported independently.