Shabbat · Cooking on Shabbat
May cold water be added to a hot water urn (miycham) that has been emptied, and may hot water be mixed with cold water on Shabbat?
The Mechaber permits adding cold water to an emptied urn to remove the chill (not cook it), and permits mixing hot and cold water as long as the hot water is not in a keli rishon. The Rema permits even keli rishon when the cold water is so plentiful that it cannot be cooked.
Rulings (3)
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