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In the summer I just run a hose from grey water to a 5 gallon buried bucket that has gravel in it, and leave the grey valve open. Works great. In the winter the hose will freeze in this arrangement.
My concern is when temps never get above freezing, seems like no matter what I do, I'm gonna have freeze-up issues.
I have a polar package and so tank/valve freezing should not be an issue during reasonable temps. I've been shutting the grey valve at night and dumping the grey during the day when it is above freezing. Not sure how well that approach will work if it is always below freezing.
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