ISO/DIS 4548-9

Methods of test for full-flow lubricating oil filters for internal combustion engines — Part 9: Inlet and outlet anti-drain valve tests

Scope

ISO 4548-9:2007 specifies methods of measuring the effectiveness of either inlet or outlet anti-drain valves if fitted to a full-flow lubricating oil filter of the "spin-on" or "easy change" type, for internal combustion engines.