Which tank is used for collecting wastewater from sinks and showers in an RV?

The Grey Water Holding Tank is specifically designed for collecting wastewater from sinks and showers within an RV. This type of tank is crucial for managing the wastewater generated from daily activities like washing hands, dishes, and taking showers. Unlike the Black Water Holding Tank, which is designated for collecting sewage waste from toilets, the Grey Water Tank handles only the less contaminated water that flows from non-toilet sources.

The Fresh Water Holding Tank is used for storing potable water used for drinking, cooking, and personal hygiene, so it does not collect any wastewater at all. The term Wastewater Treatment Tank generally refers to systems designed to treat wastewater before it is released, rather than merely holding it, and thus does not fit within the context of an RV's typical storage tanks. Therefore, the choice of Grey Water Holding Tank accurately reflects the primary function of storing wastewater from sinks and showers in the RV system.