What is the minimum width of a trench bottom in a disposal field?

The minimum width of a trench bottom in a disposal field is typically set at 12 inches. This requirement is designed to ensure that there is sufficient space for the proper installation of the drainage system while allowing adequate soil infiltration and aeration. A trench that is too narrow could restrict the flow of effluent and hinder the performance of the disposal system.

The 12-inch minimum width also helps prevent issues related to soil compaction and encourages better treatment of wastewater as it moves through the soil layers. A wider trench can lead to more efficient distribution of effluent, reducing the chance of clogging and ensuring that the disposal field functions effectively over time.

Understanding the dimensions required for trench installation is crucial for maintaining a properly functioning septic system and ensuring compliance with local regulations and standards.