If one kashers a pot by boiling water in it (and throwing rocks in so it overflows) or kashers silverware IN a pot, what is the status of the water afterwards? [I see that water can acquire some different status after certain uses, but I don't know if kashering is one of those situations]

Is the water totally useful or has it, by effecting a kosher status after touching the non-kosher surfaces, somehow taken the non-kosherness (if that's a thing) away so it shouldn't then be used? Is water constantly "self-kashering"?

L'ma'aseh, if I took my pork pot, wash it, wait a few days, then boil water and rocks in it, and, as it is boiling, throw some eggs in or some soup makings? Or should I dump the water and start fresh with a clean pot?

  • The custom is to rinse vessels in cold water after kashering (OC 452:7). So in the case of your pork pot you would just dump it out when rinsing it – Double AA Feb 22 '18 at 16:57
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    So I dump the water into another pot and use it there to make eggs? Is the custom to rinse because of a concern over the water? – rosends Feb 22 '18 at 18:14

The Taz in Siman 95 sif katan 10 discussing a different case explains the Ram"a which says: "we treat the water as issur, le'chatchilla", says that reason is because water is not considered something important. Based on that I think that even when a dish a becomes kosher again the water has to be thrown out. Also check the pri magadim there.

  • could I let the water cool (in the case of a case of a pot full of cutlery) and then reuse it for other cutlery after heating it up again? What is the nature of the issur? – rosends Feb 23 '18 at 14:07
  • no sure. because it depends on a few factors of why you are kashering and how much issur is in the pot walls. also keep in mind that in your question the issur is now technically pagum... also in general the contents of a pot aren't 60 x the walls of the pot so you can't use that to say that the issur is nullified in the water unless you know the amount of issur that there was initially absorbed in the pot... you get my drift... – Art Feb 23 '18 at 14:38

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