I believe it is kind of difficult to say how much anti freeze to use. I always use as much as needed. Basically, I blow all the line with air first to removed as much water as possible. Empty all tanks and closed the valve. I ran antifreeze at every tap, toilet, washer and ensure lots of it come out, about 4 gallons. once than done I blow that stuff out a bit, do not spend as much time on the second process and at that time empty all the tanks (black and gray)with the Sanicon, so lots of antifreeze is pump out to ensure it will not freeze. Do not need to add more for the sanicon. Like several mention, antifreeze is cheap insurance and the sanicon bailed me out a couple of time on an uphill issue when dumping, so it will stay there for sure.
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MalyHupe
2017 Jayco Precept 35S
2021 Ford Ranger 4WD Lariat Tremor - Blue Ox set up
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