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15 votes

Is it permitted to bring bottled water from an outside source into a kosher dining hall?

My best guess is that it's the policy of the kosher dining hall to not allow outside food or drink to cut down on the amount of non-kosher food which comes in. To my knowledge, there's nothing wrong ...
ezra's user avatar
  • 18.9k
11 votes

Why does water purify?

R Aryeh Kaplan in his beautiful book Waters of Eden (also part of his Anthology vol. 2) writes this is a chok (law without explicit reasons) and cites Bamidbar Rabbah 19:8 By your lives, a dead ...
mbloch's user avatar
  • 53.3k
10 votes

Is it permitted to bring bottled water from an outside source into a kosher dining hall?

Without being able to ask the staff who sets the standards for your "kosher cafeteria", we can only speculate if it was truly not allowed to bring a water bottle in, or why. However, this is my best ...
David Kenner's user avatar
  • 10.9k
9 votes

Does a sotah make a bracha?

Sefer Otzar Palos HaTorah pg.161 brings down that no birkas hanehenin is said on Sotah water since it has a bad flavor. Rav Chaim Kaniefsky rules that one does not make a birkas hamitzvah on Sotah ...
sam's user avatar
  • 42.3k
9 votes

One shouldn't drink water in front of others - but other drinks are OK - why?

Water is explicitly mentioned as problematic in the Talmud. Bechorot 44b אמר רבי אבא בריה דרבי חייא בר אבא משתינין מים בפני רבים ואין שותין מים בפני רבים ותניא נמי הכי משתינין מים בפני רבים ואין ...
Alex's user avatar
  • 49.8k
7 votes
Accepted

Why doesn't Tefilat Geshem have a verse referring to Miriam?

It's important to notice that there IS a verse for Miriam in the Hoshanos that we all said (or mumbled) just a day before Tefillas Geshem, and we must remember that Tefillas Geshem and Hoshanos were ...
aaron's user avatar
  • 637
7 votes

May liquids other than water be used to kasher a material?

It's a machlokes haposkim - see Rema, Orach Chaim 452:5, citing Orchos Chaim. The Ramban says it's no good, while the Rashba allows it. So the Rema says that it shouldn't be done, but bedieved (after ...
Meir's user avatar
  • 9,823
6 votes

Blessing over a wine-water mix

It appears that you need 1/6 (17%) of wine or grape juice to still be able to say hagefen. The issue is that wine nowadays is already diluted. The proper way therefore appears to be to first say the ...
mbloch's user avatar
  • 53.3k
6 votes
Accepted

Leaving drink out over night

That the Gra was very careful about the Talmudic prohibition against uncovered beverages is recorded in Maaseh Rav #95. The details of this prohibition are recorded in the Tur (YD 116) and earlier by ...
Double AA's user avatar
  • 100k
6 votes
Accepted

Is it Bishul Akum if a gentile boils non potable water?

In general there is no prohibition of bishul akum with water since its form and taste do not change through cooking. Star-K for instance writes Foods whose form and taste do not change through ...
mbloch's user avatar
  • 53.3k
6 votes

May liquids other than water be used to kasher a material?

Rema OC 452:5 writes that one cannot kasher with liquids other than water in the first instance, but that after the fact they work.
Joel K's user avatar
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6 votes
Accepted

Is a Shehakol blessing required when drinking water in order to not become thirsty?

R' Nissim Karelitz in חוט שני mentions this case and says that you would not make a Bracha. However if there is any small amount of enjoyment, like if it is hot outside, then you would have to make a ...
Chatzkel's user avatar
  • 13.2k
6 votes
Accepted

How can a mikvah be kosher if rain water flows through it?

As mentioned in the comments, the Mikva already has 40 seah and the running rain water is in addition to that so it won’t make it passul. I’ve searched for a direct source for this on this Rambam and ...
Chatzkel's user avatar
  • 13.2k
5 votes
Accepted

Salt Water With Karpas

What else do you put on your salad besides salt water? That's what the word salad means after all! Oh a vinaigrette, you say? Indeed Tosfot (Pesachim 114a) and others (and ruled in the Shulchan Arukh ...
Double AA's user avatar
  • 100k
5 votes

Ki'bolo Kach Polto

R Ezra Friedman from OU Kashrut brings an answer to your question (here) It would seem logical based on the principle of kebol’o kach polto that not only would the method of kashering be based on the ...
mbloch's user avatar
  • 53.3k
4 votes

For puposes of Tashlich, what is considered a "body of water"?

According to this article it is "ideal" to use a flowing, natural body of water that contains fish and is located outside the city boundaries (MA 583:5; Kitzur Shulchan Aruch 129:21). https://www.ou....
Benyomin Walters's user avatar
3 votes

Using hot water on shabbos

There are at least 2 aspects involved: How to get hold of hot water on Shabbat without desecrating the Shabbat. This is a technical question. You could leave the tap on, assuming the water remains ...
Danny Schoemann's user avatar
3 votes

Must ice cubes be designated meat or dairy and separated?

This Halacha is discussed in Shulchan Aruch Yore Dea 91: א בָּשָׂר וּגְבִינָה שֶׁנָּגְעוּ זֶה בָּזֶה, מֻתָּרִים, אֶלָּא שֶׁצָּרִיךְ לְהָדִיחַ מְקוֹם נְגִיעָתָן. וּמֻתָּר לָצוּר אוֹתָם בְּמִטְפַּחַת ...
kouty's user avatar
  • 22.9k
3 votes

Coffee Urns on Shabbos

R. Ovadiah Yosef (Hazon Ovadiah Shabbat vol. 4, 414ff.) rules on this exact type of urn that it is permissible to use. In presenting the question, he discusses various issues at play that are ...
Oliver's user avatar
  • 12.1k
3 votes

Hot water tap at work

The Star-K advises as follows: In general, these are permissible. If one witnessed a co-worker submerging the spout into non-kosher food, the urn should not be used. In many cases, however, one does ...
Yehuda's user avatar
  • 2,065
3 votes
Accepted

Refilling a percolator on Yom Tov

The Federation Beis Din here in London have an incredible department called 'Fed Tech' which explores various appliances and their halachic status on Shabbos and Yomim tovim etc. Their article on urns ...
Dov's user avatar
  • 33.7k
3 votes

Can you use carbonated water for washing?

With regards to netilas yadayim: The Aruch Hashulchan 160:17 brings a machlokes if one can use something else besides water. The Raavad and Rosh hold only water can be used and Rashi and the Rashba ...
sam's user avatar
  • 42.3k
3 votes
Accepted

For puposes of Tashlich, what is considered a "body of water"?

I was in Yerushalayim for Rosh Hashanah this year for the first time. I saw in Yeshivas Netzach Yisrael in Rechavia that they had a small fishbowl with two goldfish swimming in it to be used for ...
Joel K's user avatar
  • 44.4k
3 votes

Is hot water on an airplane kosher?

I have been flying nearly every week for 20+ years. I cannot recall having seen the hot water urns on planes used for anything else than hot water, tea or coffee (note many airlines prepare coffee ...
mbloch's user avatar
  • 53.3k
3 votes

Water to prevent dehydration before kiddush on Shabbos morning?

Firstly, if there's a risk to one's health, one's health takes precedence over these (and most other) Halachot, especially since these are D'Rabanan (Rabbinical). If there's merely discomfort: The ...
Danny Schoemann's user avatar
3 votes

Ritual immersion with washing of the body?

The purpose of tevillah (ritual immersion) is not for cleaning, it is to rid oneself of impurity. There is, however, a problem of chatzitza (seeration) - if, for example, your leg was caked with dirt ...
Kovy Jacob's user avatar
3 votes
Accepted

Ritual immersion with washing of the body?

No, the immersion is just a dunk in the water. It doesn't require any kind of scrubbing. The Rambam writes in Hilchot Mikvaot 1:2 כָּל מָקוֹם שֶׁנֶּאֱמַר בַּתּוֹרָה רְחִיצַת בָּשָׂר וְכִבּוּס ...
Avraham's user avatar
  • 1,660
3 votes
Accepted

Is collected rainwater on Shabbat nolad

MB 338:30 says it’s not muktzah לרחיצה - דאין על המטר היורד שם מוקצה או נולד ויכול לשתותו או לרחוץ ממנו וה"ה אם הוא ראוי רק לשתיית בהמה
Chatzkel's user avatar
  • 13.2k
2 votes

Can one make ice on Shabbos?

All of the above answers are fantastic - I just wanted to share this great story to help remember Rav Moshe Feinstein's psak halacha: When Rav Heinemann asked Rav Moshe this question regarding making ...
NJM's user avatar
  • 14.5k
2 votes

Does a sotah make a bracha?

Following up on @Ezra's question as to to whether a Birchas Hamitzvah is made, and adding support to @sam's answer which states that no Bircas Hamitzvah would be made: The Rivash (1326–1408) ...
alicht's user avatar
  • 12.1k

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