Preface: dupes will automatically empty a canister filler if there is a bottle emptier set to empty the gasses that are bottled.
Have two fillers, only want to empty gas from one area into another. Set emptier to chlorine. Disable one bottle emptier. Watch as dupes continuously empty the filler even though it is disabled. Still fills bottles and is still allowed to be emptied.
Build emptier. Set to a gas. Build filler. Fill bottles with said gas. Disable filler. Watch as bottles still get filled, removed, and brought to emptier.