(Uninterrupted power supply). On the upper floors in apartment buildings, often the water flows from the taps, that is, barely (or not at all) due to inadequate pressure in water supply systems. This sometimes happens and is the fault of public services, often as a result of intensive simultaneous water uptake by consumers.
Not to be at the most inopportune moment before the fact of lack of water in the system (for example, when you want to drink or to wash hands), you can, of course, to keep the stock in the bucket. But it is better to go the other way and complete the housing system water (even cold water) additional tank receiver. For home craftsmen — the work is simple and the benefits before storing in a bucket — obvious contributions to the reserve will be made automatically at any time of the day (even at night), when the water pressure in the system is sufficient. In the absence of water in the system it can even not notice — the water will flow in the tap as usual, but only now — from the tank-receiver.