Previously Installed ABS Pipe

• 1). Mark the ABS pipe at the place where it needs to be cut, using a pencil. Rest the blade of a handsaw on the mark with a thumb on one side of the saw to help guide the blade.
  
  
• 2). Move the saw slowly backward and forward across the pipe. When the blade starts cutting into the pipe, remove your thumb. Make a straight perpendicular cut right through the pipe.
  
  
• 3). File away all plastic fragments or burrs from the cut pipe end, using a utility knife or fine sandpaper.
  
  

Yet-to-Be Installed ABS Pipe

• 1). Mark the cutting point on the new section of ABS pipe. Adjust the miter saw's locking handle to 90 degrees and turn it clockwise to tighten it in position.
  
  
• 2). Place the ABS pipe horizontally on the miter saw's base and against the back stop. Position the mark on the pipe with the circular saw blade. Hold the pipe firmly with one hand (12 inches or more from the blade) and squeeze the saw's trigger to turn it on. Pull the saw's handle down to cut fully through the pipe.
  
  
• 3). Lift up the handle and remove the cut pipe. Cut off any burrs from the pipe with the utility knife.