The separator treats these wastes by allowing substances lighter than water (such as oil) to float and substances heavier than water (such as sand) to sink. Only the gray water between these two zones should flow to the wastewater system.
What does an oil water separator do?
Oil water separators are designed specifically to target oil based on the gravity difference between oil and water, allowing for heavier solids (sludge) to settle to the bottom while oil rises to the top, leaving additional wastewater in the middle layer.