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10
votes
1answer
790 views

Koshering granite

I have been told that a granite counter top is similar to glass in that it is not porous and does not absorb taste from food that touches it. Is there a source in halacha for this concept? What other ...
6
votes
1answer
278 views

Microwave on Pesach

A friend told me that his family will kasher his microwave in general (ie if non-kosher food was heated up in it) but will not kasher it for Pesach, letting it lie dormant instead. Does anyone have a ...
4
votes
1answer
155 views

How is Hagalah done on glass?

With regards to using glass vessels on Pesach that were used year round, The Shulchan Aruch HaRav (Orach Chaim 451:63) says that, for Ashkenazim, if the glass vessel was used multiple times during the ...
9
votes
1answer
529 views

Knife sharpening - can it be done anywhere?

Can you take a Challa knife to any knife sharpener or would you have to Kasher it after it is sharpened? Would there be a difference if it is a meat or cheese knife?
6
votes
2answers
371 views

Can an immersion heater be used to kasher a sink? Does anyone have experience with this?

Normally, to "kasher" or "kosherize" a metal sink (from non-kosher to kosher, or before Passover), you clean it out well, make sure it's used for nothing hot for 24 hours, then pour boiling water all ...
7
votes
3answers
2k views

Kashering pot from meat to dairy/parev?

I know I've learned somewhere that you can't kasher a meaty pot for use with dairy (except for Pesach), but I can't find a source for it now. Can anyone provide a source? (The sauce would be a light ...
6
votes
1answer
386 views

Forms of Kashering a knife

I remember hearing that a knife can be kashered (from being treif) by sticking it in the ground. But I also know you can use the traditional kashering methods - Hag'ala and Libun. I have 2 ...
16
votes
2answers
174 views

Hagalah in Denver?

In high-altitude cities, water boils at a lower temperature than the standard 212 degrees Farenheit. For example, in Denver the boiling point is about 203 degrees. Can one kasher utensils with hagalah ...
13
votes
2answers
257 views

Why does one need to kasher burners on a stove for passover?

I don't use separate burners for milk and meat during the year, nor do I think there's any reason to do that. So why the need to kasher burners before passover?
10
votes
2answers
7k views

Kashering a microwave

How can I kasher a microwave?