🛠️🚿 How a Septic Drain Field (Leach Field) Is Built – Step by Step This image shows a standard septic drain field system, where wastewater is safely dispersed into the soil after treatment. Below is a clear, practical explanation based directly on what you see in the image 👇 --- 🧱 Step-by-Step Construction Process 1️⃣ Septic Tank Installation The septic tank is installed underground and connected to the house sewer line. Inside the tank, solids settle at the bottom while liquids flow out tow