A common term that refers to both cylinders and tanks is ______________.

The term that accurately encompasses both cylinders and tanks is "vessel." In technical contexts, the word "vessel" is often used to describe any container designed to hold fluids, gases, or other substances. This definition applies to various shapes and sizes, including those commonly seen in RV systems such as propane tanks and water tanks. Both cylinders and tanks serve as vessels that contain materials essential for the proper functioning of RV systems, such as fuel, water, and waste.

By signaling a broader classification, "vessel" emphasizes not just the physical structure but also the intended purpose of holding and managing different types of substances, a critical aspect of RV maintenance and operation. Understanding this terminology is important for technicians, as it aids in effective communication and ensures clarity when discussing equipment used in recreational vehicles.