Stratasys J850 Manual page 120

The waste container consists of a plastic container inside a cardboard box.
You typically dispose of the entire waste container—including the box.
Therefore, you must assemble a new box and insert a new plastic container
before you can install it in the printer.
1. Assemble the cardboard box, making sure to punch out the perforated
sections.
2. Place a new plastic container into the box.
1. Locate the door on the lower-left side of the printer.
2. Push in the top-center of the door to release the latch and open the door.
3. Carefully slide out the waste container to remove it from the printer.
4. Place the new waste container next to the full container.
5. Unscrew the cap securing the waste drain tube and connect it to the new
container.
6. Close the full container with the cap supplied with the new waste
container.
7. Close the new waste container box.
If necessary, use tape to hold it closed.
8. Position new the waste container in the printer.