I just experimented with this for you & I was able to move the both the full & closed barrel from either side AFTER putting the pipes in place. I'm assuming (hopefully correctly) you're referencing the barrel In the LEFT pipe room as that's the hardest to do.
- From the original position, drag the barrel past the pregnant beaker.
- Drag the barrel to the spot right before the ornaments.
- Go back around & push the barrel up to the corner of the pipe.
- Then push the barrel over to the right, so it's in the open path & finally, push it into place.
All that said, without a screenshot, I can't tell if you have an obstruction that I dont or if you're truly stuck. . So if there's something technical that needs to be addressed, you need to create a SUPPORT TICKET:
Scroll past the white search box & choose a category to begin the form.