What device is recommended to avoid increasing suspended solids and organic matter in sewage systems?

The recommended device to avoid increasing suspended solids and organic matter in sewage systems is the garbage disposal. When used, garbage disposals shred food waste into smaller pieces, which can lead to an increase in suspended solids and organic matter in the sewage systems. This is because the finely ground food particles can overwhelm the treatment process, leading to potential blockages and increased maintenance needs in the sewage systems.

Conversely, devices such as a standard sink or a low-flow shower do not inherently increase suspended solids or organic matter, but they also do not directly address the issue at hand. A rainwater collection system is more focused on managing stormwater and reducing runoff, rather than the specific impact on sewage systems. Therefore, while the use of a garbage disposal is common, it can contribute negatively to the health of sewage systems by introducing more organic matter that those systems must treat. In contrast, the other options are less impactful in terms of increasing solids and organics in sewage systems.