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For instance, if something non-edible such as a chemical or eraser shavings are drained down the sink, would that cause any kashrut problems?

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    Are they edible material? What about water?
    – Yishai
    Commented May 29, 2015 at 21:39
  • There is discussion about minerals being kosher as far as gold and tefillin goes, to consider gold min humutar bificha. However, pouring something nonkosher down a drain is almost never an issue. Unless your Jewish plumber had removed the trap and placed his mouth around the open pipe. That would be problematic. But under normal circumstances, just wash the chemical down with cold water. Soap too, to help you feel better.
    – user6591
    Commented May 29, 2015 at 21:41
  • @Yishai I'm thinking mostly non-edible. With water, the issue is the same. Does it become non-kosher if some other non-biological matter is mixed in? Commented May 29, 2015 at 21:51
  • @user6591 "Unless your Jewish plumber had removed the trap and placed his mouth around the open pipe. That would be problematic." Yes, you'd potentially be liable for murder... Commented Jun 29, 2015 at 13:47
  • Plastic can become problematic acc to some opinions
    – sam
    Commented Aug 7, 2015 at 2:19

2 Answers 2

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Inedible nonbiological matter has Kashrus neutral status. It is not, nor can it become, non kosher. Completely inedible matter also has Kashrus neutral status. This would include completely inedible matter of biological origin as well as completely inedible mixtures containing biological matter (For example,detergent or drain cleaners are Kashrus neutral due to their complete inedibility, regardless of biological ingredients contained in them.)source This is because the Torah only permits or forbids the eating of food, and is never concerned with the consumption of non-food.

In rare cases, you might have an issue with blios, that is, absorption of taste from edible matter. For example, a metal pot (Kashrus neutral) used to cook non kosher food can absorb taste from the non kosher food.

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    Can you cite a specific place in that extensive work which makes the claims you attribute to it?
    – Double AA
    Commented May 29, 2015 at 22:00
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    @DoubleAA They are asur b'hanaah, but that's not a kashrus issue per se.
    – LN6595
    Commented May 29, 2015 at 22:00
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    @DoubleAA Yayin Nesech is edible. Nonedible items (like tikrovet avoda zara) are asur b'hanaah. The taste of a non edible item is not considered hanaah.
    – LN6595
    Commented May 29, 2015 at 22:17
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    Its not biological
    – Double AA
    Commented May 29, 2015 at 22:36
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    @hazoriz , DoubleAA I edited the post to clarify your points.
    – LN6595
    Commented Aug 7, 2015 at 1:38
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the laws of kosher are discussed in the torah in parsha shmini (Lev.11).

there it discusses the kosher status of fish, animals and birds.

no mention of plants or inanimate materials. so we can assume none of those are forbidden regarding kosher

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    What happened to Orlah/Revai/Kilayim/Tevel/Chadash/Bikkurim/Terumot/Maaserot/Sefichim/Yeinam?
    – Double AA
    Commented Jul 29, 2015 at 6:39
  • you left something out? how about venishmartem?
    – ray
    Commented Jul 29, 2015 at 10:21
  • Oh I forgot Challah.
    – Double AA
    Commented Jul 29, 2015 at 14:16
  • @DoubleAA what happened to avodah zara (ashera), hekdesh, nidrei isur, cheremim?
    – ray
    Commented Jul 29, 2015 at 20:36
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    What about them?
    – Double AA
    Commented Jul 29, 2015 at 20:40

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