If one put vessels under a water-spout, whether they be large vessels or small vessels or even vessels of dung, vessels of stone or earthen vessels, they make the mikveh invalid. It is all alike whether they were put there [purposely] or were [merely] forgotten, the words of Bet Shammai. But Bet Hillel declare it clean in the case of one who forgets. Rabbi Meir said: they voted and Bet Shammai had a majority over Bet Hillel. Yet they agree in the case of one who forgets [and leaves vessels] in a courtyard that the mikveh remains clean. Rabbi Yose said: the controversy still remains as it was.

If one makes a hollow in a water-spout to collect pebbles, its water disqualifies the mikveh; In the case of a wooden [spout] if it holds even a little, But in the case of an earthenware [spout] if it will hold a quarter-log. Rabbi Yose says: also in the case of an earthenware [spout] if it holds even a little: they have spoken of "a quarter-log" only in the case of broken sherds of an earthenware utensil. If the pieces of gravel moved about inside [the hollow], it disqualifies the mikveh. If dirt went down into it and was pressed down, [the mikveh continues to be] valid. If the spout was narrow at each end and wide in the middle, it does not disqualify [the mikveh] invalid, because it had not been made to gather anything in it.

Drawn water and rain water which were mixed together in a courtyard or in a cavity or on the steps of a cave: If the greater part was valid, the whole is valid; And if the greater part is invalid, the whole is invalid. If they were equal in quantity, the whole is invalid. When [does this apply]? When they were mingled together before they arrived at the mikveh. If [the drawn water] flowed into the [rain] water: it was known that there fell in forty seahs of valid water before there came in three logs of drawn water, [the mikveh is] valid; otherwise it is invalid.

In the case of a trough in a rock: One may not fill up [the hatat waters] from it, nor may the [hatat waters] be consecrated in it, nor may one sprinkle from it. And it does not require a tightly stopped-up covering, And it does not invalidate the mikveh. If it was a vessel and had been joined to the ground with lime: One may fill up the hatat waters from it and the hatat waters may be consecrated in it, and one may sprinkle from it, And it requires a tightly stopped-up covering; And it invalidates the mikveh invalid. If a hole was made in it below or at the side so that it could not contain water in however small a quantity, it is valid. And how large must the hole be? Like the tube of a water-skin. Rabbi Yehudah ben Batera said: it happened in the case of the trough of Yehu in Jerusalem that there was a hole in it like the tube of a water-skin, all the pure things in Jerusalem were made using it. But Bet Shammai sent and broke it down, for Bet Shammai say: [it remains a vessel] unless the greater part of it is broken down.