Freezing is only one possible problem, although maybe the biggest.

If you have a two inch line and it has a 1" dip in it that allows the condensation to collect there you now have a 1" airline. If it has a 2", 3" or 4" dip in it that collects the condensation you are now having to push air through that water and will have an increased AMP draw/reduced flow.

In my scenario my airline is buried 2' deep. Only problem is I have the valve box close to the lake. I could not put the valve box 2' deep because we would have been below the water line. Would have needed to be MUCH deeper than 2' to maintain any kind of grade at all. The airline comes up a few inches right at the end to meet the valves. That made a huge condensation trap that initially led to a 30% increase in the power drawn and then eventually froze up somewhere.


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