Rosh Yeshiva Responds
Rabbi Linzer answers halakhic questions from rabbis and community members

22 02, 2023

Tevilat Keilim on Yom Tov for Use on Yom Tov

February 22nd, 2023|Tevilat Keilim, Yom Tov|


What is the Rosh Yeshiva’s position on toiveling keilim (immersing dishes) on Yom Tov?


Although I’m curious about the specific circumstances (e.g. where are you going to be tovel it? Why couldn’t you do it beforehand?), I think it is fine. See Shulchan Arukh OC 323:7 where the Shulchan Arukh rules that m’ikar ha’din (according to the basic halakha) it is permitted, and Rema implicitly agrees. While in Darkhei Moshe he rules that it is forbidden, and many Ashkenazi Achronim are strict

29 01, 2023

Sous Vide—Tevilat Keilim and Warming Food on Shabbat

January 29th, 2023|Bishul, Kashrut, Orach Chayim, Shabbat, Technology, Tevilat Keilim, Yoreh De'ah|

New York

Two questions regarding a sous vide:

1) Does it require tevilah?
2) Can it be used to reheat food on Shabbat, assuming it is on and in heated water from Erev Shabbat?


1. It does not require tevilah. It does not come in direct contact with the food (plastic bag and water both intervene). (Shulchan Arukh YD 120:4, Arukh HaShulchan YD 120:32, Sefer Tevilat Keilim, 1:4 ft. 7)


15 01, 2023

Tevilat Keilim for a Mug with a Rubber Stopper

January 15th, 2023|Kashrut, Tevilat Keilim, Yoreh De'ah|



This glass mug by Bodum has a rubber stopper at the bottom that is designed to allow the air trapped between the two layers to expand due to heat but to not let water in since the water would get trapped inside. Can it be toveled/is the rubber a hatzitza? It is designed to be there and be left in place, so would it be considered to be eino makpid? (YD 120:13)


If this is a functional part of the mug, then it is more than eino makpid—it