As the picture shows, we start with a clean and level excavation.

Then, the tanks are carefully lowered into the excavation.

 

The tanks are then checked for level, and adjusted as necessary.

The center tank is filled with water to prevent movement, and the excavation is back-filled evenly.

Here, the 5-in-1 is in place, and another clean, level excavation has been made for the sand filters.

Installation complete.  The sand filters have been installed, and the whole area has been back-filled and leveled.

 

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