Standards & Publications
BULLETIN 155 – Water Barrier Filters
This Bulletin describes the mandatory actions that Users shall take prior to using Water Barrier Filters in their operations, following information about a manufacturing defect received from the manufacturer.
Bulletin 155 - Water Barrier Filters 
Bulletin 155 - Water Barrier Filters - FR 
Bulletin 155 - Water Barrier Filters - DE 
Bulletin 155 - Water Barrier Filters - ES