What is the minimum trench width requirement for gravelless system construction?

The minimum trench width requirement for gravelless system construction is indeed 18 inches. This specification is important because it ensures adequate space for the installation of the sewage system components while allowing for the necessary functions, such as air circulation, water infiltration, and maintenance. A trench that is too narrow could impede the proper function of the system and increase the risk of clogs or reduced efficacy of effluent treatment. Furthermore, the standard width allows for appropriate placement of the system’s media and ensures that there is enough space to work safely and efficiently during installation and future maintenance tasks. Having this minimum width helps to promote better overall system performance and longevity, which are crucial aspects in managing private sewage systems effectively.