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Using a Hot Water Urn on Shabbos

Question for the Rabbi: May we use an urn for hot water on Shabbos with an external water level indicator? Full Story

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Hot and Cold mixing
January 21, 2019 1:41 am

To #9: The concept referred to is known as “tata’ah gavar” (“what’s on the bottom has precedence). It’s not about the actual mixing involved, but rather when they are mixed, the resulting temperature is in the middle. For example, (this is described in great detail in Shulchan Aruch ch 318, if memory serves) pouring cold water onto a bunch of hot water is assur (when the hot water is at least half of the amount of cold water that you wanna pour), since the bottom is hot, and thus is stronger in its affect. However if you want to pour… Read more »

On Line Rov
January 14, 2019 9:53 pm

https://shulchanaruchharav.com/halacha/electric-urn/

Heating the water before Shabbos:[6] In all cases[7], the water in the electric urn must be heated to half its heat [i.e. to at least 50 Celsius/122 Fahrenheit[8]] before Shabbos [sunset[9]] begins, and hence one must make sure to set it up and turn it on with enough time before sunset for it to heat up to this amount.

Two rabbis - 2 opinions
January 14, 2019 9:50 pm

So #15 says that Rabbi Schwei said the water “should” be boiled before shabbos (and not clear if should means it must or it is better,,,)

While #17 says that Senior Chabad Rov (local or international) says that best to have water warm by shkiya (113 degrees) but if not, it is ok, even cold – but caution not to use water till it is fully boiled…

Can a third opinion settle this REAL question!!!!

The following is Psak of a senior Chabad Rov
January 14, 2019 4:09 pm

L’chatchilah the water temperature in the urn should reach 45 degrees Celcius (113 degrees Fahrenheit) by shkiyah. (This gives deference to Reb Moshe Feinstein’s psak that water should be boiled before shabbos – as such it is “boiled” at yad tzoledes bo). Usually, with most urns, this is easily reached in approx 20 minutes, if one fills the urn just prior to licht tzinden till shkiyah. This is “the best” practice l’chatchila! B’di’eved, if one forgot and simply filled the urn closer to zaman of shkiyah – it is 100% perfectly ok to use the water (only) AFTER it is… Read more »

To #15: Please clarify!!
January 13, 2019 3:55 pm

Did the rabbi say “the water SHOULD be boiled before shabbos” (meaning l’chatchila it is better that the water be boiled before shabbos), or did he say, “the water MUST be boiled before shabbos” (meaning that if it was not boiled before shabbos – it cannot be used!)????

question was asked to rabbi schwei
January 13, 2019 8:56 am

This question was asked to rabbi schwei. He said the water should be boiled before shabbos. Also he said to tell the goyish workers in 770 not to add more water to the urn on shabbos

Anonymous
January 12, 2019 9:28 pm

Anonymous poskim in the comments are not so helpful.

#12
January 12, 2019 7:06 pm

In the olden times before urns and Keurigs we had kettles. Chainiks. We put one on the blech before Shabbos and had hot water on Shabbos.

Shabbat prohibitions
January 12, 2019 6:09 pm

So how did Jews in ancient times keep their water hot, I wonder. Or did they just drink cold? Yesterday’s answers do not necessarily fit today’s questions in this highly technological and digital age.

.

#4-#7
January 12, 2019 5:56 pm

4 opinions on question of #3!!!
Definitely yes. Definitely no. Partial
Please get a definitive answer posted!!!

Here is the Solution
January 12, 2019 5:51 pm

If you put a piece of scotch tape on the little hole on top of the exterior glass tube then no water goes into the actual percolator. I read it in the four volume series on laws of shabbos. Whenever I go to a hotel shabbos weekend program I check to see what type of perculator the caterer put out and if need be slip a tape over the little hole on the exterior glass indicator.

hot and Cold Water Mixing
January 12, 2019 3:28 pm

“Moreover, some claim that according to the laws of physics, hot and cold water that are touching will always mix between themselves, causing the heat to be distributed relatively evenly.”

In that case, how can the bor al gabei bor mikva work?

Urn erev shabbos
January 12, 2019 11:27 am

Yes you can. It has to be fully cooked or raw/uncooked before Shabbos.

To #4
January 11, 2019 3:38 pm

Please cite your source for that. A Shabbos urn with no buttons has the status of Garuf V’Katum.

to 3
January 11, 2019 3:29 pm

yes has to be cooked before shabat but not up to 212f.
if gets to around 110 farenheit it’s fine.
remember that you have the 18 min that if the urn is small they will be hot enough when comes shkiah

#3 yes you can
January 11, 2019 3:22 pm

Unless it has a dial which you could turn up on Shabbos to make it boil quicker, it is OK.

To #3
January 11, 2019 2:30 pm

No you cannot

Filling Urn before shabbos
January 11, 2019 1:55 pm

Please reply:
Can one plug in an urn filled with cold water at licht bentchen?

(Does the water in urn need to be cooked/hot before shabbos?)

PLEASE REPLY HERE!!!!!!!!!!!!!!!!!

measuring
January 11, 2019 12:39 pm

is there an issue of measuring?

good to get halacha here!
January 11, 2019 12:32 pm

maybe you can post the full details about a crock pots and blech, on Shabbos and a warming drawer.

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