ISO-4548-9 Complete Document History
Methods of test for full-flow lubricating oil filters for internal combustion engines - Part 9: Inlet and outlet anti-drain valve tests

Complete Current Edition:
   2ND EDITION - LUBRICATING OIL FILTERS FOR INTERNAL COMBUSTION ENGINES - Feb. 1, 2008

Obsolete Revision Information:
   1ST EDITION - PART 9: INLET & OUTLET ANTI-DR - July 1, 1995