I am hoping/planning on installing 2 or 3 4'x20' solar heaters for an in-ground pool which is around 450 sf. My pool house roof is too small to install this on as it is only 16x7 as faces south east. The house roof is over 60 feet away and doesn't have any good sections to install solar so I was thinking about ground installation on a rack facing south with a buried pipe. The issue I have is that the ground slopes downward from the pool house. I have read that it isn't a good idea to install solar panels that are lower than the pump as it can cause damage from not draining. Does anyone have any experience in this? Is this true? I would probably remove them in the winter as I am north of Syracuse and we get 200" of snow a year so this question isn't around winterization.