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Koshering an Oven for Pesach: Difference between revisions
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##Ashkenazim are strict for the miyut tashmish of the utensil initially and not after the fact (Rama 451:6). If there’s no other options we can be lenient since the ikar hadin is that we follow rov tashmisho (Binat Tzvi p. 81; similar to Gra on S”A YD 108:8 that shaat hadachak is like bedieved). | ##Ashkenazim are strict for the miyut tashmish of the utensil initially and not after the fact (Rama 451:6). If there’s no other options we can be lenient since the ikar hadin is that we follow rov tashmisho (Binat Tzvi p. 81; similar to Gra on S”A YD 108:8 that shaat hadachak is like bedieved). | ||
###We can’t rely on rov tashmisho when there’s a beliya yadua (Binat Tzvi quoting Rav Elyashiv) | ###We can’t rely on rov tashmisho when there’s a beliya yadua (Binat Tzvi quoting Rav Elyashiv) | ||
#### The Maharam Chalavah Pesachim 30b s.v. vhilchata writes that following the main use of a utensil is only effective if we’re unsure if the utensil was ever used for the other type and we’re allowed not to be concerned for an abnormal use. This is also the opinion of Tosfot Chullin 8a s.v. shlibna, Meiri Pesachim 30b s.v. hasakinim, and Raah cited by Nemukei Yosef Pesachim 30b. However, the Ran Chidushim Pesachim 30b s.v. vhilchata absolutely holds that we follow the majority of uses even though it is certain that it was used for the other type of use. Ramban Avoda Zara 76a s.v. umah sh’amru and Rashba a”z 76a s.v. vkatav agree. This is also implied by Rabbenu Dovid Pesachim 30b s.v. vhilchata. Kaf Hachaim 451:100 follows that approach and cites many who agree including: Sharei Kneset Hagedola 451:6, Pri Chadash, Olot Tamid, Eliya Rabba 451:17, Chok Yakov 451:31, Bet Dovid 212, Gan Hamelech 53, Erev Hashulchan 451:11, Chemed Moshe 451:12, and Shulchan Aruch Harav 451:31. | |||
###We can’t rely on rov tashmisho to exclude spills because spills are common (Binat Tzvi) | ###We can’t rely on rov tashmisho to exclude spills because spills are common (Binat Tzvi) | ||
####Proof is Mishna Brurah 451:34 who says that a tripod which you spill on needs libun even though rov tashmisho is to hold pots and asur even bedieved if you did hagalah! | ####Proof is Mishna Brurah 451:34 who says that a tripod which you spill on needs libun even though rov tashmisho is to hold pots and asur even bedieved if you did hagalah! | ||
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##Many rishonim hold that chametz is only hetera baala and therefore libun kal is enough. Yachava Daat 2:63 says that if there’s no other option you can rely on those rishonim to kasher oven with libun kal. | ##Many rishonim hold that chametz is only hetera baala and therefore libun kal is enough. Yachava Daat 2:63 says that if there’s no other option you can rely on those rishonim to kasher oven with libun kal. | ||
##Shulchan Aruch 451 and meforshim all assume chametz is isura baala even though there’s stirah to this in S”A 452. | ##Shulchan Aruch 451 and meforshim all assume chametz is isura baala even though there’s stirah to this in S”A 452. | ||
[[Category:Pesach]] | |||
# How can libun kal work if there's an cheres lining of the oven?<ref>This [https://www.katom.com/cat/commercial-oven/oven-liners-porcelain-vs-stainless-steel.html article] describes that some ovens are purely stainless steel and some have porcelain-enameled steel. Another [http://porcelainenamel.com/502_-_Mechanical/ article] describes the method of making porcelain enamel and how it is a very thin layer (anywhere between 1mm and 125mm)</ref> | |||
## Rav Moshe Feinstein (Mesoret Moshe v. 1 p. 230) is quoted as saying that indeed this is an issue and it isn't possible to kasher an oven with porcelain lining. [https://yeshiva-university.zoom.us/rec/play/usAsduuh-283HoLAtASDAPZ9W9S0eq2s0igX-_pez0jkW3EFZFr1M7QRa7Qf9B_vOGt5lyO0vcW9I1-0?startTime=1585760529000&_x_zm_rtaid=CQsocm3ZRaq6pGgFL5OMGQ.1585880286593.75ff95374a21dbfc2f0c45524d508e2a&_x_zm_rhtaid=674 Rav Willig (April 1 2020, min 31-34)] explained that the thin layer of porcelain isn't a problem and libun kal, by putting it up to the highest temperature it reaches, works for an oven for pesach. | |||
==Sources== | |||
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