When installing a sink, it is important to realize that it is a device that is supplied with both hot and cold water. The waist water runs into disposal drains into the building's waste system. Sinks come in many shapes and sizes. Water pipes can be on top or on the side; disposal tube is always under the sink.
For a wall-hung sink you should have a mounting board which should be placed between studs, a mounting bracket to support the lavatory according to specifications for installing the lavatory. You must set the lavatory in place on the mounting bracket.
Installing hot and cold water pipes is the easiest part, especially when they are flexible. For this, you should only pay attention which pipe is for which (hot or cold).
Another important item in a house is a water closet. These come in many shapes and their disposal areas may not be in the same place (for some of them, disposal areas are on backside, for others they go straight down). This should be well noticed when buying a water closet. For installing a water closet, it just has to be attached to the drainpipe and water pipe should be attached to the water tank.
Flushing in toilet can be controlled with a flush meter. This must be installed directly on the closet bowl or hung on the wall.