Related על ביצה 2:3

Rabban Shimon b. Gamliel says: The house of Shammai used to say that a priest because of his Heave no immerse on public holiday bath. But he may go into immerse when he passes from one purpose to another and from one group to another. What does it mean "when he passes over from one purpose to another"? If he wants to use his dough on his press or use his press for his dough, he immerses on the same day.

One may not immerse vessels on the holiday. One must not make Hashakah in a stone vessel to water to clean it on the Sabbath. These are words of Rabbi. But the other sages say: One may immerse the vessel in the water on the holiday and one may do hashaka in a stone vessel in order to make clean but not to immerse are vessels through a parental impurity become impure, so one must not submerge them on the holiday; and you don't even have to say: On the Sabbath. But he may fill a cup, a bucket, or a drinking vessel, to drink, and thinks of it and submerges her. He may go into hiding as usual because of a severe impurity; and one need not even say: Because of a slight impurity.