Can swimming pools stay empty during the winter season? — Jay, Las Vegas, Nev.
Marshall Brain Answered:
As a general rule, it is a bad idea to leave a pool empty at any time, but especially in the winter. The problem is that if the ground gets saturated, the empty pool acts like a big boat and floats out of the ground. You can see two examples of this phenomenon in the following videos:
For more info see:
- How Swimming Pools Work and
- Why can boats made of steel float on water when a bar of steel sinks?