(Last Updated: August 14, 2020) Many RV owners find the process of draining their black and gray tanks a distasteful one. However, it is a vital task that you have to undertake in a proper and timely manner. The process involves connecting your RV sewer hose to a dump station and then opening the valve to allow wastewater to drain ... Read more 4 Best RV Sewer Hose Supports 2020