If you use a Waste Master hose system that we recommend, here is a quick tip on how to use it to BACK WASH your black tank in order to get more “crap” out of the tank. Please remember, for this to work, you want your gray tank to be 75% full or more.

Our Blog Post and Video on the Waste Master HoseCLICK HERE

Amazon Link to Waist Master HoseCLICK HERE