Quote:
Originally Posted by meyerske
...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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In the situation you describe, this is what I have done as well.
Leaving the gray valve open is a mistake. Because there is no "rush" of water when tank is empty, the water will just trickle and move slow.... It will freeze in every little bend/divit in your hose; making an ice dam slowly over time.