Some are accustomed to draw water from wells and springs on Motzei Shabbos as a Segula for a cure for all their ailments. [This is helpful for both physical and spiritual ailments and assists in one’s understanding of Torah.]
How is one to fulfill the above Segula if he does not have a well or spring available to draw water from? Does it suffice to simply open the faucets?
Yes. One can use water drawn from the faucet on Motzei Shabbos, with intent of this Segula. It does not help to use water that was drawn before Shabbos.
The Kolbo relates the following incident: There was a certain man which was suffering from leprosy whose wife went out to draw water on Motzei Shabbos. She was delayed at the well and unknowingly managed to draw the water from the well of Miriam. When she came home her husband vented anger at her delay to the point that it caused her to drop the bucket. Drops of water spilled on his skin and immediately cured all the areas they touched. On this the Sages stated the angry man only benefited from the amount of water that remained due to his anger. Based on this it became accustomed to draw water on Motzei Shabbos.
 This is based on the statement of the Sages that the well of Miriam which is found in the sea of Tiberius meets every Motzei Shabbos with all wells and springs, and whoever is able to grab this water and drink it is immediately healed from all ailments. Therefore the custom is to draw water every Motzei Shabbos, as perhaps one will receive the water of Miriam’s well. [ibid] The Rama [299/10] adds that he has not seen this custom being followed. Admur however omitted this in his ruling. See Sichos Kodesh 5739 Vol 3 p. 277-279 for an analysis in this subject.
 Rav Chaim Felagi in Kaf Hachaim 31/53
 Kitzur Halachos Shabbos 300 footnote 9
 Brought in Taamei Haminhagim 423