To turn off the water in one apartment only if it has the valves on the pipes of hot and cold water. This is enough for example to repair a faucet, but for more major work, such as replacement of plumbing still have to turn off the water on all strut. The riser is a vertical pipe that serves 1-2 apartments on each floor.
If you have the valve inside the apartment, turn it clockwise until it stops. This should be enough to stop the flow of water. However, in the apartments of the old buildings of the valve on the pipes may not be, and any works will have to call the locksmith from the housing Department and shut in the basement to the entrance. With the breaking of the main pipes the water is shut off for the entire house, and sometimes for several buildings. In new houses, if the pipes were placed skilled professionals, each pipe may have a valve that can shut off the water at a single site, and sometimes special sensors that detect damage to themselves and stop the water flow.
Sometimes a situation arises for example when a person is out of town, because of a pipe burst in one apartment without water are all residential premises located on this riser. In this case, shut off water to one apartment with a damaged pipes is impossible, and to make repairs without the permission and presence of owner is forbidden by law. All you can do is all possible ways to track down the landlord and negotiate with him about the repair. To pick up the keys to open the door and any other way to get into the apartment – a criminal offense.
If hot water in the apartment is for one occupant and find it impossible, please contact the housing office with the requirement of recalculation of payment for forgone services. If you do not, the rent will be charged in full, even if you lived a month without hot water.