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
SRPS ISO 4548-9:2017
PROJECT
naSRPS ISO 4548-9:2026
40.60
Close of voting
Aug 27, 2026