After pumping RV antifreeze through the water system, how much should you put into the grey and black tanks, if they are drained as best as possible? I have heard amounts ranging from 2 cups to a full gallon in each tank. Does anyone have a good rule of thumb? Also should the black tank be treated with deodorizer as well? This is my first time doing this. Is there anything else that I should do or be prepared for?
Thanks for the assistance.
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David & Carolyn
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