Cannister filler

I think this is the same as the bottle emptier/canister emptier, but I don't really use the canister filler. My workaround for those is to set them to sweep only, and make sweep errands with priority whatever. The errand shows up on the emptier, not the object (a little annoying but whatever)--and the priority of the emptier determines if it or another is selected. Perhaps a workaround for the filler is to just put a pipe empty task on the input pipe of the filler? Roughly the same effect, but I'm guessing it's slower.