You can find flap adjustment and replacement instructions at the end of the installation videos below, or follow these easy steps: V1 Flap Replacement/Adjustment Remove the outer frame with the flap attached Remove the screws at the top of the frame securing the flap Using a flat head screwdriver, pry open the metal strip/bar that clasps the flap in place Position new flap in frame, push down the strip/bar to clasp the flap in place and secure with screws Screw the pet door frame back in place V2 Flap Replacement/Adjustment Remove screws on flap holder Remove flap Replace flap and align Adjust flap to desired height and tighten screws TIP: For less noise or magnet strength, adjust the flap to a higher position.