Filters use an ‘AND’ logic (results match all of the selected options in the same category). Only the “HQ Location” category uses an “OR” logic.

EXAMPLES:
If you’re only interested in storage tanks, leave all the checkboxes in the “Equipment Type” section unchecked.
If you’re looking for suppliers that provide both a storage tank and a CIP, selecting both options will only display companies that manufacture both storage tanks and CIP.