WEnRV Publishing and Industry Partners

How to Flush Your Black Tank After Dumping Option 1: Built-in Black Tank Flush System If your RV has a built-in black tank flush (check your RV manual): Empty the Black Tank First Connect your sewer hose and dump the black tank until it's empty. Connect a Water Hose to the Flush Inlet Never use your fresh water hose—use a separate hose clearly l...