How should each fixture be connected to the soil or waste system?

Each fixture should be connected to the soil or waste system independently to ensure proper drainage and maintenance. This independent connection minimizes the risk of blockages affecting multiple fixtures and allows each fixture to function optimally without interference from others. An independent connection means that if a clog occurs in the line of one fixture, it does not impact the drainage of other fixtures, thereby enhancing the overall reliability of the plumbing system.

While sometimes fixtures can be grouped or connected using common lines, doing so can introduce points of failure that may compromise the performance of multiple fixtures. Central hubs or common connections may create complications regarding venting and outflow capacities, leading to potential issues such as backflow or inadequate drainage. Therefore, connecting each fixture independently adheres to best practices in plumbing design, promoting efficiency and ease of maintenance.