What size stones are typically used in a gravel septic system?

In a gravel septic system, the stones used are typically of larger sizes that allow for adequate drainage and aeration within the system. Sizes typically categorized as 3, 4, 5, and 6 are appropriate because they provide the necessary void spaces between the stones, facilitating the movement of wastewater and the treatment process that takes place in the gravel.

The larger stone sizes help to prevent clogging, allowing effluent to pass through efficiently while also supporting the structure of the system. Using stones that are too small could lead to compaction, which may inhibit drainage and the natural filtration process necessary for effective wastewater management. Therefore, the inclusion of sizes like 3, 4, 5, and 6 is crucial for optimal performance in gravel septic systems.