Tell me more ×
Mi Yodeya is a question and answer site for those who base their lives on Jewish law and tradition and anyone interested in learning more. It's 100% free, no registration required.
up vote 4 down vote favorite

I've heard that there is a dispute among poskim if one is allowed to use such an urn on Shabbos enter image description here (also here) as the outside water tube gets cold over Shabbos. Both sides agree that "Yesh bishul achar bishul" (there is cooking after cooking).

What is the argument? It seems to be a machlokes b'mtzius (an argument over a fact).

share|improve this question
Are you talking about the particular urn, because there is a tube containing water that shows the fill level, or are you talking about any urn, because of concern that some water might be left in the spout? – Seth J Jan 10 '12 at 3:44
@SethJ the one that shows the water level. – Shmuel Brin Jan 10 '12 at 3:45
Why does it matter that the outside water gets cold? You're allowed to cool water on Shabas. – msh210♦ Jan 10 '12 at 5:06
@msh210 when it goes from there into the cup it will be re-cooked (and Yesh bishul achar bishul bedavar lach). – Shmuel Brin Jan 10 '12 at 5:10
Ah, I didn't know it goes into the cup. Thanks for clarifying: you may wish to edit the clarification into the question. I'll delete this and my previous comment bl"n. – msh210♦ Jan 10 '12 at 5:11
show 2 more comments

1 Answer

up vote 2 down vote

As Rabbi Willig explained it, one factor would be whether or not we are concerned with heating more water already above yad soledet bo. Another is if this water's temperature is in fact below that (say this water is at 140 F...is that above or below). There may well be other factors. Tipping the urn backwards before Shabbat to ensure all water is pre-boiled seemingly does help, and was in fact his advice in this case.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.