What is an important characteristic of gravity filters?

Gravity filters operate based on gravitational force, which is a fundamental principle utilized in many water treatment processes. In gravity filtration, water flows through the filter media solely due to the force of gravity, relying on the natural downward movement of water as it passes through layers of material used for filtration, such as sand or gravel. This method is efficient and energy-saving since it doesn't require external pressure or mechanical assistance to drive the water through the system.

Understanding this principle is crucial when considering the design and function of various water treatment facilities, as gravity filters can effectively remove suspended solids and pathogens from water without the need for additional energy inputs. This characteristic makes gravity filters a common choice for both municipal water treatment applications and smaller-scale operations.