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A detailed cross-section technical illustration of an underground wastewater system with two buried metal tanks and connecting pipes under a grassy field.

A detailed cross-section technical illustration of an underground wastewater system with two buried metal tanks and connecting pipes under a grassy field.

A detailed technical illustration of a small underground wastewater system in a rural yard. Two old stainless aluminum milk tanks from the 1970s are buried in the ground at different depths. Each tank has its own suction pipe reaching to the lowest point inside the tank. The tanks are not connected underground. Both suction pipes run upward with a continuous slope through soil toward a single above-ground suction connection point (a Pierrot-style suction fitting). The pipes are smooth, DN100–DN125 plastic pipes with no low spots. The system is shown in a cross-sectional cutaway view of the ground, clearly revealing soil layers, gravel base, and a concrete slab under the tanks for stability and anti-buoyancy anchoring. The suction connection is located in a small service pit near the surface. Clean engineering style, precise labeling, realistic technical drawing, high detail, engineering blueprint mixed with realistic rendering, daylight, educational diagram style. Mehr sehen