Waste water drainage system

Here are the basic systems in use for the disposal of waste water.

2 pipe drainage system for older waste drains

The waste water from the baths, kitchen sink, basins, is all drained to a gulley outside. This system has a water trap to prevent smells emerging from the drains.

The waste from toilets is routed directly to the mains drainage via a larger vented pipe.

Single stack drainage system for newer waste drains

All waste water (bathroom, kitchen, toilets) is fed into one large vented drainage pipe which connects to the mains drainage.

All waste drainage systems

 Carefully identify the correct route for disposing of waste water. For example, it is illegal to dispose of effluent into the surface water drainage system as this system is for the collection of rainwater and frequently connects to nearby streams which would become contaminated by the disposal of sewage.

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