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.
PUBLISHED
ISO 4548-9:2008
PROJECT
ISO/DIS 4548-9
40.20
DIS ballot initiated: 12 weeks
Jun 3, 2026
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