It's unclear whether hatches are intended to block items from entering a hopper when closed, but they don't.
MC-9657
Closed Hatches Allow Items to Pass Into Hoppers.
Resolved
Duplicate
0
Brandon
(Unassigned)
Unconfirmed
hatch
Snapshot 13w05b
Retrieved
Duplicate of MC-6266, please use the search function to see if your bug has already been submitted. Currently over 51% of tickets are being closed as duplicate.