This is the beginner's guide to understanding Waste Water Treatment Plants (WWTP), commonly known as septic systems. Waste water is the general term for all effluent and grey water produced in your home. It includes flow from: -Toilet -Bath -Shower -Sinks -Floor drains -Laundry -Dishwasher The average household uses up to 150 liters of water per person, per day. In the city, your sewer drains from your house connects to the Council main and away. In non-sewer rural areas the sewer drain will connect to a WWTP or septic trenches. In this book we will endeavor to explain the different systems, the dos and don'ts of living with a septic system, and a troubleshooting guide for the most common problems and the things you can check to hopefully save you money and some minor headaches.