What is a common maintenance task for RV water systems?

Regularly checking filter cartridges is a common maintenance task for RV water systems because filters are essential for ensuring that the water supplied throughout the RV is clean and safe to use. Over time, these filter cartridges can become clogged with sediment, minerals, and other impurities, potentially leading to a decrease in water quality and flow rate. By routinely inspecting and replacing these filters as needed, RV owners can maintain a healthy water system, prevent damage to appliances, and enhance the overall efficiency of their water supply.

The other options, while they may be maintenance tasks considered by some RV owners, do not represent the standard routine activities required for maintaining RV water systems. For instance, draining the water heater each month may not be necessary and could lead to issues if done too frequently. Replacing all hoses annually is also excessive unless there is visible wear or damage. Testing for lead contamination every year is important but may not be a typical maintenance task performed regularly in most RVs, as it depends more on the water source and local regulations.