In countries with a colder climate like the UK the swimming pool needs to be prepared for the winter months. But even in warmer climates, you might discover that some of the following information is useful.
If you do not take the correct precautions over the colder months than you are liable to frozen pipes, cracked pump and skimmer baskets and ice over the water which in turn can cause other major costly problems to your pool or spa.
During the cold temperatures water expands when it freezes, meaning that if trapped inside pipes and equipment it will expand and crack them. PVC pipes, fittings and ABS plastic pump parts are most at risk, but soft copper heat exchangers are also in danger too.