The service includes draining and cleaning of the cesspit whenever required by the circumstances. The typical septic tank is a large, buried, rectangular, or cylindrical container made of concrete, fiberglass, or polyethylene.

Wastewater from the toilet, bath, kitchen and laundry flow into the tank. Septic tanks must be pumped once every 1 or 2 years, depending on the tank's size, number of persons in the household, and whether or not occupants are minimizing release of unnecessary solids into the wastewater.

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