Plastic and chrome plated water traps to prevent odours entering the room or building from the foul water drainage system.
Waste water from your trough sinks, basins and toilets is disposed of straight into the mains water drainage system. This drainage system deals with a lot of waste, which can lead to a build-up of smelly gas which you do not want entering your building. This is the reason why water traps or placed on the outlet of all appliances discharging into the mains water drainage system.
Every sink, wash basin, and urinal discharging water inside a building requires a water trap at the point of connection into the waste pipework.
The trap will only work and prevent smells when it has water inside which provides the water seal.