@casheroo During Passover, you may not eat, among other things, anything leavened, which I guess means something that is allowed to rise. There is a ritual in very observant households called “searching for Chometz” (that is pronounced with a guttural ch as in the German word “Ich”) wherein the residents will clean out every crumb from the pantry, clean the kitchen, the oven, solely to make sure that there is no chance of consuming leavening.
Observant households will ordinarily have one set of dishes and cutlery for milk and one for meat. At Passover, there are two completely different sets of dishes used for Passover. That is four sets of dishes in all.
When you see Kosher for Passover on a commercial product it usually means one of three things: that the equipment used in production of say, milk, or Pepsi, has been thoroughly cleaned before the start of production of KP products and the cleaning is done under Rabbinical supervision or they are using a completely different equipment for production and it has been certified under Rabbinical supervision or the product contains nothing that could possibly render it unfit for Passover and I have a hard time citing something like that.
I am not an expert on this but I believe that wines shown as Kosher for Passover (known to us as Pesadiche) must be pasteurized in order to kill bacteria or perhaps yeast leftover from fermentation but don’t quote me on that.
Chag Sameach Pesach = Happy holiday Passover ( in Hebrew)
or as we learned it growing up in the Bronx, in Yiddish
Good Yontiff.
SRM