MB3 141b: Soaking and Rinsing Produce on Shabbos (319:7-10)

Using a funnel or large plate to separate מלילות from their shells is prohibited since you might come to do it with a sieve/sifter. Soaking vetch in water to remove the bad part is prohibited. Soaking/rinsing produce to remove pesticides or dirt on Shabbos. Running already drinkable water or wine through a strainer.